草业学报 ›› 2026, Vol. 35 ›› Issue (2): 131-142.DOI: 10.11686/cyxb2025103
杜建民1(
), 王占军1, 汪威2, 马雪鹏1, 李东宁3, 李吉祥2
收稿日期:2025-03-25
修回日期:2025-06-03
出版日期:2026-02-20
发布日期:2025-12-24
作者简介:杜建民(1977-),男,宁夏青铜峡人,副研究员,硕士。E-mail: nxdjm2007@126.com
基金资助:
Jian-min DU1(
), Zhan-jun WANG1, Wei WANG2, Xue-peng MA1, Dong-ning LI3, Ji-xiang LI2
Received:2025-03-25
Revised:2025-06-03
Online:2026-02-20
Published:2025-12-24
摘要:
为解析田间晾晒苜蓿干燥速率变化和营养物质耗损过程,揭示影响苜蓿干草调制的主要环境因素。通过对引黄灌区不同收获茬次机械刈割压扁晾晒苜蓿的植株含水量及主要营养物质[粗蛋白(CP)、粗灰分(Ash)、粗脂肪(EE)、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)、可溶性碳水化合物(WSC)、相对饲喂价值(RFV)]含量的定时采集,结合晾晒过程中田间气象要素与土壤水分含量的监测,分析苜蓿晾晒水分散失、营养物质变化过程,通过相关性分析,明确影响干燥速率、营养物质变化的主要环境因素。结果表明:1)苜蓿晾晒过程中,生理干燥阶段占晾晒历时的比例为19.80%~52.25%,随5-9月收获季节的延续生理干燥阶段历时占比逐步减小;全株的干燥速率介于茎和叶片之间,在生理干燥阶段干燥速率为:叶片>全株>茎,而在生化干燥阶段为:茎>全株>叶片,且生理干燥阶段茎、叶片及全株干燥速率分别是生化干燥阶段的1.79、7.69和3.43倍。2)营养物质CP、WSC、EE含量和RFV在晾晒始末、生理及生化干燥阶段均有下降,而Ash、NDF和ADF含量则为上升,且EE、RFV、WSC的损失以及Ash、NDF和ADF的增加主要发生在生理干燥阶段,其损失率和增幅占比分别为52.09%~75.00%和48.53%~62.94%,而CP的损失主要发生在生化干燥阶段,其损失率占比达71.18%~75.82%。3)环境因素对干燥速率的影响为:气温>太阳辐射强度>风速>空气相对湿度>0~10 cm土壤含水量,且气温、太阳辐射强度、风速是影响干燥速率的主效因子,均与干燥速率呈显著或极显著正相关关系;影响营养物质含量的主要环境因素为:气温、风速、空气相对湿度和0~10 cm土壤含水量。
杜建民, 王占军, 汪威, 马雪鹏, 李东宁, 李吉祥. 灌区苜蓿田间晾晒干燥速率与营养物质变化对主要环境因素的响应[J]. 草业学报, 2026, 35(2): 131-142.
Jian-min DU, Zhan-jun WANG, Wei WANG, Xue-peng MA, Dong-ning LI, Ji-xiang LI. Response of drying rate and nutrient content changes to the main environmental factors during alfalfa natural drying in irrigation areas[J]. Acta Prataculturae Sinica, 2026, 35(2): 131-142.
茬次 Stubble | 刈割日期 Cutting date (month-day) | 鲜草产量 Fresh grass yield (t·hm-2) | 晾晒厚度Drying thickness (cm) | 晾晒 历时 Drying time (h) | 天气状况 Weather conditions | 太阳辐射强度Solar radiation intensity (W·m-2) | 气温 Air temperature (℃) | 空气相对湿度Air relative humidity (%) | 风速 Wind speed (m·s-1) | 刈割时0~10 cm土壤含水量 Soil water content at 0-10 cm when cutting (%) |
|---|---|---|---|---|---|---|---|---|---|---|
第1茬 The first stubble | 5-25 | 23.40 | 10 | 55.5 | 晴Sunny,有风Wind | 417.90 | 24.73 | 14.17 | 3.73 | 11.76 |
第2茬 The second stubble | 6-30 | 21.55 | 7 | 74.5 | 晴Sunny,阵风Gust,7月1日下午阵雨July 1st afternoon shower | 482.55 | 29.08 | 40.25 | 1.02 | 14.49 |
第3茬 The third stubble | 7-31 | 10.83 | 4 | 31.5 | 晴Sunny,有风Wind | 481.83 | 34.01 | 37.53 | 0.88 | 14.23 |
第4茬 The fourth stubble | 9-14 | 12.34 | 5 | 50.5 | 晴转多云Sunny change to cloudy,有风Wind | 246.30 | 22.54 | 45.17 | 0.89 | 10.74 |
表1 各茬次苜蓿晾晒持续时间及主要环境参数
Table 1 Duration and main environmental parameters of alfalfa drying in each stubble
茬次 Stubble | 刈割日期 Cutting date (month-day) | 鲜草产量 Fresh grass yield (t·hm-2) | 晾晒厚度Drying thickness (cm) | 晾晒 历时 Drying time (h) | 天气状况 Weather conditions | 太阳辐射强度Solar radiation intensity (W·m-2) | 气温 Air temperature (℃) | 空气相对湿度Air relative humidity (%) | 风速 Wind speed (m·s-1) | 刈割时0~10 cm土壤含水量 Soil water content at 0-10 cm when cutting (%) |
|---|---|---|---|---|---|---|---|---|---|---|
第1茬 The first stubble | 5-25 | 23.40 | 10 | 55.5 | 晴Sunny,有风Wind | 417.90 | 24.73 | 14.17 | 3.73 | 11.76 |
第2茬 The second stubble | 6-30 | 21.55 | 7 | 74.5 | 晴Sunny,阵风Gust,7月1日下午阵雨July 1st afternoon shower | 482.55 | 29.08 | 40.25 | 1.02 | 14.49 |
第3茬 The third stubble | 7-31 | 10.83 | 4 | 31.5 | 晴Sunny,有风Wind | 481.83 | 34.01 | 37.53 | 0.88 | 14.23 |
第4茬 The fourth stubble | 9-14 | 12.34 | 5 | 50.5 | 晴转多云Sunny change to cloudy,有风Wind | 246.30 | 22.54 | 45.17 | 0.89 | 10.74 |
晾晒时段 Drying stage | 植株部位 Plant parts | 干燥速率Drying rate | ||||
|---|---|---|---|---|---|---|
第1茬 The first stubble | 第2茬 The second stubble | 第3茬 The third stubble | 第4茬 The fourth stubble | 均值 Average value | ||
晾晒始末 Drying process | 茎Stems | 1.04±0.08b | 0.85±0.04b | 1.53±0.11c | 0.87±0.06b | 1.07±0.02c |
| 叶片Leaves | 1.18±0.06a | 0.95±0.07a | 2.26±0.14a | 1.12±0.09a | 1.38±0.04a | |
| 全株Total plant | 1.07±0.10ab | 0.87±0.08ab | 1.78±0.12b | 1.02±0.08ab | 1.19±0.05b | |
生理干燥 Physiological drying stage | 茎Stems | 0.86±0.07c | 1.16±0.10c | 3.35±0.18c | 1.61±0.11c | 1.75±0.07c |
| 叶片Leaves | 1.98±0.11a | 1.57±0.06a | 7.35±0.24a | 4.20±0.26a | 3.77±0.16a | |
| 全株Total plant | 1.17±0.08b | 1.32±0.08b | 4.69±0.31b | 2.95±0.17b | 2.54±0.12b | |
生化干燥 Biochemical drying stage | 茎Stems | 1.23±0.06a | 0.69±0.03a | 0.97±0.07a | 0.69±0.04a | 0.89±0.05a |
| 叶片Leaves | 0.31±0.02c | 0.61±0.05b | 0.66±0.04c | 0.36±0.02c | 0.49±0.03c | |
| 全株Total plant | 0.95±0.04b | 0.63±0.03ab | 0.87±0.06b | 0.55±0.04b | 0.74±0.04b | |
表2 苜蓿植株各晾晒时段干燥速率比较
Table 2 Comparison of drying rates of alfalfa plants during different drying stages (%·h-1)
晾晒时段 Drying stage | 植株部位 Plant parts | 干燥速率Drying rate | ||||
|---|---|---|---|---|---|---|
第1茬 The first stubble | 第2茬 The second stubble | 第3茬 The third stubble | 第4茬 The fourth stubble | 均值 Average value | ||
晾晒始末 Drying process | 茎Stems | 1.04±0.08b | 0.85±0.04b | 1.53±0.11c | 0.87±0.06b | 1.07±0.02c |
| 叶片Leaves | 1.18±0.06a | 0.95±0.07a | 2.26±0.14a | 1.12±0.09a | 1.38±0.04a | |
| 全株Total plant | 1.07±0.10ab | 0.87±0.08ab | 1.78±0.12b | 1.02±0.08ab | 1.19±0.05b | |
生理干燥 Physiological drying stage | 茎Stems | 0.86±0.07c | 1.16±0.10c | 3.35±0.18c | 1.61±0.11c | 1.75±0.07c |
| 叶片Leaves | 1.98±0.11a | 1.57±0.06a | 7.35±0.24a | 4.20±0.26a | 3.77±0.16a | |
| 全株Total plant | 1.17±0.08b | 1.32±0.08b | 4.69±0.31b | 2.95±0.17b | 2.54±0.12b | |
生化干燥 Biochemical drying stage | 茎Stems | 1.23±0.06a | 0.69±0.03a | 0.97±0.07a | 0.69±0.04a | 0.89±0.05a |
| 叶片Leaves | 0.31±0.02c | 0.61±0.05b | 0.66±0.04c | 0.36±0.02c | 0.49±0.03c | |
| 全株Total plant | 0.95±0.04b | 0.63±0.03ab | 0.87±0.06b | 0.55±0.04b | 0.74±0.04b | |
茬次 Stubble | 取样时间 Sampling time (h) | 粗灰分 Crude ash (Ash,%DM) | 粗蛋白 Crude protein (CP,%DM) | 可溶性碳水化合物 Water soluble carbohydrate (WSC,%DM) | 粗脂肪 Ether extract (EE,%DM) | 中性洗涤纤维 Neutral detergent fiber (NDF,%DM) | 酸性洗涤纤维 Acid detergent fiber (ADF,%DM) | 相对饲喂价值 Relative feeding value (RFV) |
|---|---|---|---|---|---|---|---|---|
第1茬 The first stubble | 0 | 8.90±0.42c | 21.29±0.24a | 14.21±0.19ab | 1.24±0.05b | 37.60±0.93e | 27.78±1.83c | 166.40±1.66a |
| 5.0 | 10.09±0.30ab | 20.43±0.40b | 14.80±0.63a | 2.87±0.39a | 38.39±0.48de | 29.78±0.95bc | 159.20±3.41ab | |
| 10.0 | 9.61±0.51b | 19.16±0.57cd | 14.30±0.29ab | 1.11±0.16e | 36.51±1.35e | 29.71±1.68bc | 167.54±9.43a | |
| 24.0 | 10.43±0.30a | 18.70±0.21d | 13.81±0.37bc | 1.09±0.07e | 39.66±1.52cd | 29.33±1.38bc | 154.93±8.29b | |
| 29.0 | 9.47±0.28bc | 20.61±0.20b | 13.12±0.23c | 1.15±0.13d | 39.64±1.72cd | 31.36±1.72ab | 151.29±8.04b | |
| 34.0 | 9.60±0.21bc | 19.63±0.52c | 14.14±0.45ab | 1.09±0.04e | 44.58±1.52a | 31.37±1.09ab | 134.51±5.10c | |
| 48.0 | 9.79±0.37ab | 17.22±0.42e | 13.18±0.64c | 1.20±0.16c | 42.19±1.66b | 33.09±1.00a | 139.18±6.92c | |
| 55.5 | 9.90±0.10ab | 18.83±0.17d | 12.36±0.10d | 1.12±0.05de | 41.07±1.10bc | 33.62±1.88a | 142.04±0.60c | |
| Loss (%) | 11.24±0.48 | 11.55±0.27 | 13.02±0.60 | 9.68±0.36 | 9.23±0.69 | 21.02±1.25 | 14.64±0.59 | |
第2茬 The second stubble | 0 | 9.49±0.55ab | 20.36±0.98ab | 13.15±1.15ab | 1.33±0.13ab | 39.59±1.12e | 31.69±0.70f | 150.88±4.85a |
| 5.0 | 10.24±1.42ab | 20.24±0.49ab | 14.02±0.59a | 1.16±0.12b | 43.29±0.54cd | 34.84±1.52e | 132.71±1.75b | |
| 10.0 | 9.64±0.53ab | 21.33±1.07a | 13.09±1.61ab | 1.52±0.10a | 42.45±1.13de | 36.74±1.15de | 132.09±4.41b | |
| 24.0 | 9.36±0.22ab | 20.57±1.46ab | 12.79±1.13abc | 1.51±0.09a | 44.38±0.91cd | 36.92±1.43cde | 114.24±2.46d | |
| 26.5 | 10.12±0.67ab | 19.65±1.79abc | 12.03±1.71abcd | 1.24±0.09b | 46.26±2.04cd | 37.51±1.05cd | 120.01±6.99cd | |
| 34.0 | 9.19±0.46b | 19.39±1.62bcd | 10.41±0.84d | 1.34±0.28ab | 45.87±1.66c | 32.56±1.01f | 128.85±5.52bc | |
| 48.0 | 9.38±0.50ab | 18.35±0.67cd | 10.87±1.24cd | 1.29±0.18ab | 42.89±2.08d | 38.93±1.05bc | 127.04±7.46bc | |
| 58.0 | 9.56±0.51ab | 18.03±0.28cd | 11.58±1.27bcd | 1.21±0.18b | 46.96±2.59bc | 37.27±1.33cd | 118.59±4.48c | |
| 72.0 | 10.37±1.02ab | 17.97±0.68cd | 11.21±0.62bcd | 1.15±0.10b | 49.46±2.02ab | 40.35±1.68ab | 108.08±6.48de | |
| 74.5 | 10.62±1.06a | 17.86±1.03d | 11.00±0.88cd | 1.21±0.12b | 52.28±1.61a | 41.90±0.68a | 100.10±3.77e | |
| Loss (%) | 11.91±0.43 | 12.28±1.34 | 16.35±0.79 | 9.02±0.22 | 32.05±0.34 | 32.22±1.26 | 33.66±0.41 | |
第3茬 The third stubble | 0 | 9.68±0.19bc | 19.15±0.38b | 13.10±0.42ab | 1.39±0.16ab | 39.43±1.14c | 30.13±1.43c | 154.36±4.90a |
| 5.0 | 9.85±0.52bc | 20.50±0.54a | 14.17±0.61a | 1.50±0.29ab | 41.71±1.01ab | 31.40±1.29bc | 143.72±5.52ab | |
| 7.5 | 10.21±0.91ab | 18.49±1.17b | 12.36±0.76b | 1.31±0.33ab | 41.81±0.96ab | 33.59±1.52abc | 139.58±3.60bc | |
| 10.0 | 9.31±0.28c | 19.53±0.75ab | 13.15±1.06ab | 1.24±0.16b | 43.63±1.20a | 34.14±1.84ab | 135.01±4.15c | |
| 24.0 | 9.41±0.46bc | 18.43±0.67b | 13.26±1.00ab | 1.63±0.10a | 39.71±1.23bc | 35.52±1.26a | 143.44±5.39b | |
| 31.5 | 10.71±0.62a | 16.42±0.29c | 11.85±0.30b | 1.28±0.16ab | 43.76±1.09a | 35.94±1.53a | 129.46±5.49c | |
| Loss (%) | 10.64±1.01 | 14.26±0.36 | 9.54±0.64 | 7.91±0.58 | 10.98±0.86 | 19.28±1.26 | 16.13±0.96 | |
第4茬 The fourth stubble | 0 | 9.08±0.57b | 20.91±0.54a | 15.73±0.79ab | 1.42±0.37a | 39.25±0.97c | 30.21±1.51c | 154.92±6.49a |
| 5.0 | 9.64±0.58ab | 20.90±1.21a | 16.18±0.86a | 1.51±0.26a | 40.29±1.63bc | 34.35±1.16ab | 143.47±7.83bc | |
| 10.0 | 9.58±0.35ab | 20.08±1.27ab | 14.68±0.44ab | 1.32±0.12a | 40.06±1.09bc | 33.93±1.39b | 141.53±2.71bc | |
| 24.0 | 9.51±0.22ab | 18.50±0.72bc | 15.78±0.98a | 1.10±0.08a | 40.99±1.15abc | 30.34±0.55c | 148.11±3.22ab | |
| 34.0 | 9.77±0.45ab | 19.31±1.19abc | 15.45±1.24ab | 1.21±0.19a | 41.77±0.81ab | 32.86±1.13b | 140.98±1.63bc | |
| 48.0 | 9.85±0.29ab | 18.18±0.85c | 14.93±0.84ab | 1.31±0.27a | 42.02±2.09ab | 34.31±0.82ab | 137.64±6.11cd | |
| 50.5 | 9.98±0.24a | 18.03±0.64c | 14.12±0.78b | 1.28±0.33a | 42.98±1.02a | 36.12±1.63a | 131.65±5.79d | |
| Loss (%) | 9.93±0.83 | 13.77±0.97 | 10.24±0.47 | 9.86±0.30 | 9.50±0.43 | 19.56±1.05 | 15.11±0.52 |
表3 各茬次苜蓿晾晒期间主要营养成分含量及损失率
Table 3 Main nutrient content and loss rate of alfalfa drying time in each stubble
茬次 Stubble | 取样时间 Sampling time (h) | 粗灰分 Crude ash (Ash,%DM) | 粗蛋白 Crude protein (CP,%DM) | 可溶性碳水化合物 Water soluble carbohydrate (WSC,%DM) | 粗脂肪 Ether extract (EE,%DM) | 中性洗涤纤维 Neutral detergent fiber (NDF,%DM) | 酸性洗涤纤维 Acid detergent fiber (ADF,%DM) | 相对饲喂价值 Relative feeding value (RFV) |
|---|---|---|---|---|---|---|---|---|
第1茬 The first stubble | 0 | 8.90±0.42c | 21.29±0.24a | 14.21±0.19ab | 1.24±0.05b | 37.60±0.93e | 27.78±1.83c | 166.40±1.66a |
| 5.0 | 10.09±0.30ab | 20.43±0.40b | 14.80±0.63a | 2.87±0.39a | 38.39±0.48de | 29.78±0.95bc | 159.20±3.41ab | |
| 10.0 | 9.61±0.51b | 19.16±0.57cd | 14.30±0.29ab | 1.11±0.16e | 36.51±1.35e | 29.71±1.68bc | 167.54±9.43a | |
| 24.0 | 10.43±0.30a | 18.70±0.21d | 13.81±0.37bc | 1.09±0.07e | 39.66±1.52cd | 29.33±1.38bc | 154.93±8.29b | |
| 29.0 | 9.47±0.28bc | 20.61±0.20b | 13.12±0.23c | 1.15±0.13d | 39.64±1.72cd | 31.36±1.72ab | 151.29±8.04b | |
| 34.0 | 9.60±0.21bc | 19.63±0.52c | 14.14±0.45ab | 1.09±0.04e | 44.58±1.52a | 31.37±1.09ab | 134.51±5.10c | |
| 48.0 | 9.79±0.37ab | 17.22±0.42e | 13.18±0.64c | 1.20±0.16c | 42.19±1.66b | 33.09±1.00a | 139.18±6.92c | |
| 55.5 | 9.90±0.10ab | 18.83±0.17d | 12.36±0.10d | 1.12±0.05de | 41.07±1.10bc | 33.62±1.88a | 142.04±0.60c | |
| Loss (%) | 11.24±0.48 | 11.55±0.27 | 13.02±0.60 | 9.68±0.36 | 9.23±0.69 | 21.02±1.25 | 14.64±0.59 | |
第2茬 The second stubble | 0 | 9.49±0.55ab | 20.36±0.98ab | 13.15±1.15ab | 1.33±0.13ab | 39.59±1.12e | 31.69±0.70f | 150.88±4.85a |
| 5.0 | 10.24±1.42ab | 20.24±0.49ab | 14.02±0.59a | 1.16±0.12b | 43.29±0.54cd | 34.84±1.52e | 132.71±1.75b | |
| 10.0 | 9.64±0.53ab | 21.33±1.07a | 13.09±1.61ab | 1.52±0.10a | 42.45±1.13de | 36.74±1.15de | 132.09±4.41b | |
| 24.0 | 9.36±0.22ab | 20.57±1.46ab | 12.79±1.13abc | 1.51±0.09a | 44.38±0.91cd | 36.92±1.43cde | 114.24±2.46d | |
| 26.5 | 10.12±0.67ab | 19.65±1.79abc | 12.03±1.71abcd | 1.24±0.09b | 46.26±2.04cd | 37.51±1.05cd | 120.01±6.99cd | |
| 34.0 | 9.19±0.46b | 19.39±1.62bcd | 10.41±0.84d | 1.34±0.28ab | 45.87±1.66c | 32.56±1.01f | 128.85±5.52bc | |
| 48.0 | 9.38±0.50ab | 18.35±0.67cd | 10.87±1.24cd | 1.29±0.18ab | 42.89±2.08d | 38.93±1.05bc | 127.04±7.46bc | |
| 58.0 | 9.56±0.51ab | 18.03±0.28cd | 11.58±1.27bcd | 1.21±0.18b | 46.96±2.59bc | 37.27±1.33cd | 118.59±4.48c | |
| 72.0 | 10.37±1.02ab | 17.97±0.68cd | 11.21±0.62bcd | 1.15±0.10b | 49.46±2.02ab | 40.35±1.68ab | 108.08±6.48de | |
| 74.5 | 10.62±1.06a | 17.86±1.03d | 11.00±0.88cd | 1.21±0.12b | 52.28±1.61a | 41.90±0.68a | 100.10±3.77e | |
| Loss (%) | 11.91±0.43 | 12.28±1.34 | 16.35±0.79 | 9.02±0.22 | 32.05±0.34 | 32.22±1.26 | 33.66±0.41 | |
第3茬 The third stubble | 0 | 9.68±0.19bc | 19.15±0.38b | 13.10±0.42ab | 1.39±0.16ab | 39.43±1.14c | 30.13±1.43c | 154.36±4.90a |
| 5.0 | 9.85±0.52bc | 20.50±0.54a | 14.17±0.61a | 1.50±0.29ab | 41.71±1.01ab | 31.40±1.29bc | 143.72±5.52ab | |
| 7.5 | 10.21±0.91ab | 18.49±1.17b | 12.36±0.76b | 1.31±0.33ab | 41.81±0.96ab | 33.59±1.52abc | 139.58±3.60bc | |
| 10.0 | 9.31±0.28c | 19.53±0.75ab | 13.15±1.06ab | 1.24±0.16b | 43.63±1.20a | 34.14±1.84ab | 135.01±4.15c | |
| 24.0 | 9.41±0.46bc | 18.43±0.67b | 13.26±1.00ab | 1.63±0.10a | 39.71±1.23bc | 35.52±1.26a | 143.44±5.39b | |
| 31.5 | 10.71±0.62a | 16.42±0.29c | 11.85±0.30b | 1.28±0.16ab | 43.76±1.09a | 35.94±1.53a | 129.46±5.49c | |
| Loss (%) | 10.64±1.01 | 14.26±0.36 | 9.54±0.64 | 7.91±0.58 | 10.98±0.86 | 19.28±1.26 | 16.13±0.96 | |
第4茬 The fourth stubble | 0 | 9.08±0.57b | 20.91±0.54a | 15.73±0.79ab | 1.42±0.37a | 39.25±0.97c | 30.21±1.51c | 154.92±6.49a |
| 5.0 | 9.64±0.58ab | 20.90±1.21a | 16.18±0.86a | 1.51±0.26a | 40.29±1.63bc | 34.35±1.16ab | 143.47±7.83bc | |
| 10.0 | 9.58±0.35ab | 20.08±1.27ab | 14.68±0.44ab | 1.32±0.12a | 40.06±1.09bc | 33.93±1.39b | 141.53±2.71bc | |
| 24.0 | 9.51±0.22ab | 18.50±0.72bc | 15.78±0.98a | 1.10±0.08a | 40.99±1.15abc | 30.34±0.55c | 148.11±3.22ab | |
| 34.0 | 9.77±0.45ab | 19.31±1.19abc | 15.45±1.24ab | 1.21±0.19a | 41.77±0.81ab | 32.86±1.13b | 140.98±1.63bc | |
| 48.0 | 9.85±0.29ab | 18.18±0.85c | 14.93±0.84ab | 1.31±0.27a | 42.02±2.09ab | 34.31±0.82ab | 137.64±6.11cd | |
| 50.5 | 9.98±0.24a | 18.03±0.64c | 14.12±0.78b | 1.28±0.33a | 42.98±1.02a | 36.12±1.63a | 131.65±5.79d | |
| Loss (%) | 9.93±0.83 | 13.77±0.97 | 10.24±0.47 | 9.86±0.30 | 9.50±0.43 | 19.56±1.05 | 15.11±0.52 |
指标 Indicators | 干燥速率 Drying rate | 粗灰分 Crude ash (Ash) | 粗蛋白 Crude protein (CP) | 可溶性碳水化合物Water soluble carbohydrate (WSC) | 粗脂肪 Ether extract (EE) | 中性洗涤纤维 Neutral detergent fiber (NDF) | 酸性洗涤纤维Acid detergent fiber (ADF) | 相对饲喂价值Relative feeding value (RFV) |
|---|---|---|---|---|---|---|---|---|
| 太阳辐射强度Solar radiation intensity | 0.381** | 0.321** | 0.161 | -0.220* | 0.098 | 0.149 | 0.165 | -0.158 |
| 气温Air temperature | 0.539** | 0.119 | 0.268* | -0.241* | 0.251* | 0.201* | 0.224* | -0.224* |
| 空气相对湿度Air relative humidity | -0.055 | -0.224* | -0.281** | -0.082 | 0.004 | 0.309** | 0.359** | -0.349** |
| 风速Wind speed | 0.203* | 0.117 | 0.132 | 0.135 | -0.117 | -0.402** | -0.435** | 0.451** |
| 0~10 cm土壤含水量Soil water content at 0-10 cm | -0.021 | -0.041 | 0.263** | -0.659** | 0.096 | 0.477** | 0.451** | -0.490** |
表4 环境因素与苜蓿干燥速率和主要营养物质含量的相关性
Table 4 The correlation between environmental factors and drying rate and main nutrients content of alfalfa during natural drying
指标 Indicators | 干燥速率 Drying rate | 粗灰分 Crude ash (Ash) | 粗蛋白 Crude protein (CP) | 可溶性碳水化合物Water soluble carbohydrate (WSC) | 粗脂肪 Ether extract (EE) | 中性洗涤纤维 Neutral detergent fiber (NDF) | 酸性洗涤纤维Acid detergent fiber (ADF) | 相对饲喂价值Relative feeding value (RFV) |
|---|---|---|---|---|---|---|---|---|
| 太阳辐射强度Solar radiation intensity | 0.381** | 0.321** | 0.161 | -0.220* | 0.098 | 0.149 | 0.165 | -0.158 |
| 气温Air temperature | 0.539** | 0.119 | 0.268* | -0.241* | 0.251* | 0.201* | 0.224* | -0.224* |
| 空气相对湿度Air relative humidity | -0.055 | -0.224* | -0.281** | -0.082 | 0.004 | 0.309** | 0.359** | -0.349** |
| 风速Wind speed | 0.203* | 0.117 | 0.132 | 0.135 | -0.117 | -0.402** | -0.435** | 0.451** |
| 0~10 cm土壤含水量Soil water content at 0-10 cm | -0.021 | -0.041 | 0.263** | -0.659** | 0.096 | 0.477** | 0.451** | -0.490** |
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