草业学报 ›› 2021, Vol. 30 ›› Issue (10): 137-146.DOI: 10.11686/cyxb2020359
• 研究论文 • 上一篇
陈晓芬1(), 张路平2, 秦文婧1, 陈静蕊1, 徐样庚3, 刘明4, 李忠佩4, 徐昌旭1, 刘佳1()
收稿日期:
2020-07-28
修回日期:
2020-10-10
出版日期:
2021-09-16
发布日期:
2021-09-16
通讯作者:
刘佳
作者简介:
Corresponding author. E-mail: liujia422@126.com基金资助:
Xiao-fen CHEN1(), Lu-ping ZHANG2, Wen-jing QIN1, Jing-rui CHEN1, Yang-geng XU3, Ming LIU4, Zhong-pei LI4, Chang-xu XU1, Jia LIU1()
Received:
2020-07-28
Revised:
2020-10-10
Online:
2021-09-16
Published:
2021-09-16
Contact:
Jia LIU
摘要:
以红壤旱地4种冬绿肥(鼠茅草、毛叶苕子、冬油菜和肥田萝卜)为研究对象,通过田间试验研究不同播种量对供试绿肥品种生物量、养分含量和养分积累量的影响,以期确定4种冬绿肥在红壤旱地的适宜播种量,为绿肥种植提高土壤肥力、保障红壤区农业可持续发展提供理论依据。试验设5个播种量处理,分别为15、30、45、60和75 kg·hm-2。结果表明,随播种量增加,4种冬绿肥地上部生物量(鲜重和干重)呈先上升后下降或趋于平稳的变化趋势。所有播种量处理中,鼠茅草在30 kg·hm-2播种量下生物量最大,而其余3种绿肥生物量达最大时的播种量为60 kg·hm-2。播种量显著影响绿肥植株体内碳、氮、磷、钾、钙和镁元素的含量,不同绿肥品种的同一养分元素含量对播种量的响应也有明显差异。4种绿肥养分元素的积累量均随播种量增加呈先上升后下降的变化趋势。综合考虑绿肥的生物量和养分积累量,通过回归方程拟合发现,本试验条件下鼠茅草、毛叶苕子、冬油菜和肥田萝卜在红壤旱地上的适宜播种量范围分别为30.7~32.7 kg·hm-2、50.4~63.4 kg·hm-2、53.5~61.4 kg·hm-2和63.0~80.1 kg·hm-2。
陈晓芬, 张路平, 秦文婧, 陈静蕊, 徐样庚, 刘明, 李忠佩, 徐昌旭, 刘佳. 红壤旱地上4种冬绿肥适宜播种量研究[J]. 草业学报, 2021, 30(10): 137-146.
Xiao-fen CHEN, Lu-ping ZHANG, Wen-jing QIN, Jing-rui CHEN, Yang-geng XU, Ming LIU, Zhong-pei LI, Chang-xu XU, Jia LIU. A study of the appropriate seeding rates for four winter green manure crops in an upland red soil of Southern China[J]. Acta Prataculturae Sinica, 2021, 30(10): 137-146.
图1 不同播种量下4种冬绿肥地上部生物量不同小写字母表示处理间差异显著(P<0.05)。Different lowercase letters indicate significant differences (P<0.05).
Fig.1 Aboveground biomass of the four winter green manures under different seeding rates
绿肥品种 Green manure variety | 播种量 Seeding rate (kg·hm-2) | C (g·kg-1) | N (g·kg-1) | P (g·kg-1) | K (g·kg-1) | Ca (g·kg-1) | Mg (g·kg-1) |
---|---|---|---|---|---|---|---|
鼠茅草V. myuros | 15 | 337.1±1.2b | 38.31±0.57a | 4.29±0.05a | 33.81±0.70a | 2.56±0.06ab | 1.67±0.02a |
30 | 338.4±6.3b | 35.33±1.12b | 4.09±0.03b | 33.68±0.66a | 2.49±0.03b | 1.60±0.05a | |
45 | 355.6±9.7a | 35.49±0.53b | 3.65±0.10c | 30.96±1.64b | 2.62±0.01ab | 1.41±0.03b | |
60 | 349.6±1.7ab | 35.84±0.26b | 3.63±0.02c | 30.24±0.26b | 2.63±0.17ab | 1.41±0.09b | |
75 | 357.2±15.3a | 32.57±0.38c | 3.33±0.03d | 30.31±0.48b | 2.84±0.35a | 1.37±0.05b | |
毛叶苕子V. villosa | 15 | 339.0±4.6b | 43.61±1.08b | 5.68±0.12b | 39.22±0.90a | 5.60±0.07c | 2.82±0.02a |
30 | 309.9±6.3d | 36.28±1.32c | 5.21±0.14c | 38.57±0.53a | 5.65±0.05c | 2.65±0.06b | |
45 | 321.7±1.6c | 35.86±0.98c | 5.29±0.05c | 38.78±0.66a | 8.65±1.60a | 2.67±0.08b | |
60 | 365.3±3.7a | 48.58±2.59a | 5.99±0.05a | 38.46±0.28a | 6.87±0.04bc | 2.60±0.04b | |
75 | 367.0±4.2a | 46.23±3.27ab | 5.08±0.15c | 39.07±0.56a | 7.09±0.11b | 2.44±0.05c | |
冬油菜B. napus | 15 | 358.9±4.3bc | 33.21±1.13a | 4.82±0.29a | 47.61±0.21a | 8.18±0.18c | 2.24±0.10a |
30 | 373.8±4.4a | 32.09±1.38ab | 4.37±0.11b | 37.75±0.24c | 10.79±0.06a | 2.17±0.07a | |
45 | 351.1±3.4c | 30.67±0.25b | 4.34±0.26b | 42.46±1.11b | 9.63±0.19b | 2.34±0.10a | |
60 | 361.5±3.1abc | 27.66±0.27c | 3.19±0.10d | 41.99±1.12b | 9.33±0.43b | 1.67±0.10c | |
75 | 365.0±13.4ab | 28.08±0.90c | 3.74±0.04c | 38.62±0.73c | 9.22±0.31b | 1.84±0.10b | |
肥田萝卜R. sativus | 15 | 355.6±2.6a | 26.40±0.59c | 3.43±0.05d | 38.07±0.98b | 12.61±0.23c | 2.27±0.10b |
30 | 341.0±4.0b | 34.68±1.24ab | 4.60±0.07a | 41.36±1.49a | 14.99±0.61ab | 2.87±0.14a | |
45 | 362.1±6.5a | 33.43±0.56b | 3.67±0.02c | 31.17±0.24d | 15.47±0.19a | 2.21±0.13b | |
60 | 353.9±5.6a | 35.16±0.33a | 3.35±0.11d | 34.69±0.66c | 15.40±0.21ab | 2.12±0.03b | |
75 | 355.6±8.6a | 35.71±1.07a | 4.00±0.08b | 37.11±0.21b | 14.77±0.23b | 2.15±0.12b |
表1 不同播种量下4种冬绿肥养分含量
Table 1 Nutrient contents of the four winter green manures under different seeding rates
绿肥品种 Green manure variety | 播种量 Seeding rate (kg·hm-2) | C (g·kg-1) | N (g·kg-1) | P (g·kg-1) | K (g·kg-1) | Ca (g·kg-1) | Mg (g·kg-1) |
---|---|---|---|---|---|---|---|
鼠茅草V. myuros | 15 | 337.1±1.2b | 38.31±0.57a | 4.29±0.05a | 33.81±0.70a | 2.56±0.06ab | 1.67±0.02a |
30 | 338.4±6.3b | 35.33±1.12b | 4.09±0.03b | 33.68±0.66a | 2.49±0.03b | 1.60±0.05a | |
45 | 355.6±9.7a | 35.49±0.53b | 3.65±0.10c | 30.96±1.64b | 2.62±0.01ab | 1.41±0.03b | |
60 | 349.6±1.7ab | 35.84±0.26b | 3.63±0.02c | 30.24±0.26b | 2.63±0.17ab | 1.41±0.09b | |
75 | 357.2±15.3a | 32.57±0.38c | 3.33±0.03d | 30.31±0.48b | 2.84±0.35a | 1.37±0.05b | |
毛叶苕子V. villosa | 15 | 339.0±4.6b | 43.61±1.08b | 5.68±0.12b | 39.22±0.90a | 5.60±0.07c | 2.82±0.02a |
30 | 309.9±6.3d | 36.28±1.32c | 5.21±0.14c | 38.57±0.53a | 5.65±0.05c | 2.65±0.06b | |
45 | 321.7±1.6c | 35.86±0.98c | 5.29±0.05c | 38.78±0.66a | 8.65±1.60a | 2.67±0.08b | |
60 | 365.3±3.7a | 48.58±2.59a | 5.99±0.05a | 38.46±0.28a | 6.87±0.04bc | 2.60±0.04b | |
75 | 367.0±4.2a | 46.23±3.27ab | 5.08±0.15c | 39.07±0.56a | 7.09±0.11b | 2.44±0.05c | |
冬油菜B. napus | 15 | 358.9±4.3bc | 33.21±1.13a | 4.82±0.29a | 47.61±0.21a | 8.18±0.18c | 2.24±0.10a |
30 | 373.8±4.4a | 32.09±1.38ab | 4.37±0.11b | 37.75±0.24c | 10.79±0.06a | 2.17±0.07a | |
45 | 351.1±3.4c | 30.67±0.25b | 4.34±0.26b | 42.46±1.11b | 9.63±0.19b | 2.34±0.10a | |
60 | 361.5±3.1abc | 27.66±0.27c | 3.19±0.10d | 41.99±1.12b | 9.33±0.43b | 1.67±0.10c | |
75 | 365.0±13.4ab | 28.08±0.90c | 3.74±0.04c | 38.62±0.73c | 9.22±0.31b | 1.84±0.10b | |
肥田萝卜R. sativus | 15 | 355.6±2.6a | 26.40±0.59c | 3.43±0.05d | 38.07±0.98b | 12.61±0.23c | 2.27±0.10b |
30 | 341.0±4.0b | 34.68±1.24ab | 4.60±0.07a | 41.36±1.49a | 14.99±0.61ab | 2.87±0.14a | |
45 | 362.1±6.5a | 33.43±0.56b | 3.67±0.02c | 31.17±0.24d | 15.47±0.19a | 2.21±0.13b | |
60 | 353.9±5.6a | 35.16±0.33a | 3.35±0.11d | 34.69±0.66c | 15.40±0.21ab | 2.12±0.03b | |
75 | 355.6±8.6a | 35.71±1.07a | 4.00±0.08b | 37.11±0.21b | 14.77±0.23b | 2.15±0.12b |
绿肥品种Green manure variety | C | N | P | K | Ca | Mg |
---|---|---|---|---|---|---|
鼠茅草 V. myuros | 0.661** | -0.817** | -0.966** | -0.837** | 0.519* | -0.879** |
毛叶苕子V. villosa | 0.681** | 0.456 | -0.172 | -0.095 | 0.470 | -0.887** |
冬油菜B. napus | -0.001 | -0.903** | -0.802** | -0.549* | 0.101 | -0.696** |
肥田萝卜 R. sativus | 0.217 | 0.774** | -0.030 | -0.349 | 0.617* | -0.480 |
表2 4种冬绿肥养分含量与播种量的相关性
Table 2 Correlation coefficients between nutrient contents and seeding rates of the four winter green manures
绿肥品种Green manure variety | C | N | P | K | Ca | Mg |
---|---|---|---|---|---|---|
鼠茅草 V. myuros | 0.661** | -0.817** | -0.966** | -0.837** | 0.519* | -0.879** |
毛叶苕子V. villosa | 0.681** | 0.456 | -0.172 | -0.095 | 0.470 | -0.887** |
冬油菜B. napus | -0.001 | -0.903** | -0.802** | -0.549* | 0.101 | -0.696** |
肥田萝卜 R. sativus | 0.217 | 0.774** | -0.030 | -0.349 | 0.617* | -0.480 |
绿肥品种 Green manure variety | 播种量 Seeding rate (kg·hm-2) | C | N | P | K | Ca | Mg |
---|---|---|---|---|---|---|---|
鼠茅草V. myuros | 15 | 292±30c | 33.15±2.85b | 3.72±0.33c | 29.25±2.50c | 2.22±0.25c | 1.45±0.16c |
30 | 428±11a | 44.69±1.39a | 5.17±0.03a | 42.60±1.16a | 3.15±0.03ab | 2.02±0.05a | |
45 | 429±13a | 42.80±1.59a | 4.40±0.17b | 37.34±2.43b | 3.16±0.07ab | 1.70±0.07b | |
60 | 319±59bc | 32.67±5.77b | 3.32±0.62c | 27.55±4.83c | 2.38±0.29bc | 1.27±0.15c | |
75 | 375±13ab | 34.25±0.83b | 3.50±0.08c | 31.87±0.85c | 3.49±0.93a | 1.44±0.04c | |
毛叶苕子V. villosa | 15 | 2402±303c | 308.09±28.53d | 40.29±5.39c | 277.76±34.84c | 39.60±4.36d | 19.96±2.19d |
30 | 3073±235bc | 358.96±8.97c | 51.65±2.94b | 382.35±27.70b | 55.97±3.15c | 26.30±1.99b | |
45 | 3200±107bc | 356.53±5.29c | 52.62±2.35b | 385.86±16.91b | 86.38±18.84a | 26.51±1.07b | |
60 | 4129±91a | 548.63±13.32a | 67.75±1.59a | 434.72±12.00a | 77.66±1.94ab | 29.38±0.69a | |
75 | 3481±147b | 438.01±24.24b | 48.18±1.61b | 370.42±6.24b | 67.21±2.22bc | 23.15±0.79c | |
冬油菜B. napus | 15 | 324±45c | 29.93±3.20c | 4.36±0.66d | 42.98±5.40d | 7.39±1.01c | 2.03±0.35d |
30 | 1053±45b | 90.46±6.63b | 12.31±0.84c | 106.41±6.20c | 30.42±1.76b | 6.13±0.52c | |
45 | 1843±498a | 161.23±45.00a | 22.57±4.89a | 221.90±55.63a | 50.37±12.91a | 12.18±2.96a | |
60 | 1966±82a | 150.41±4.02a | 17.32±0.59b | 228.23±3.54a | 50.73±2.84a | 9.04±0.31b | |
75 | 1650±101a | 127.29±13.49ab | 16.95±1.38b | 174.71±12.15b | 41.66±2.24a | 8.31±0.38bc | |
肥田萝卜R. sativus | 15 | 2880±245d | 213.73±17.13e | 27.77±2.41e | 308.61±31.82c | 102.19±9.79d | 18.42±2.06d |
30 | 3043±90d | 309.72±19.92d | 41.04±2.27d | 368.84±4.68b | 133.65±2.85c | 25.62±0.77c | |
45 | 4516±175c | 416.74±7.47c | 45.71±1.18c | 388.62±5.48b | 192.86±5.91b | 27.55±1.23bc | |
60 | 5299±266a | 526.30±21.57a | 50.16±2.26b | 519.37±23.90a | 230.51±9.08a | 31.73±1.72a | |
75 | 4873±110b | 489.36±18.11b | 54.85±1.37a | 508.51±3.82a | 202.42±1.78b | 29.49±1.55ab |
表3 不同播种量下4种冬绿肥养分积累量
Table 3 Nutrient accumulation of the four winter green manures under different seeding rates (kg·hm-2)
绿肥品种 Green manure variety | 播种量 Seeding rate (kg·hm-2) | C | N | P | K | Ca | Mg |
---|---|---|---|---|---|---|---|
鼠茅草V. myuros | 15 | 292±30c | 33.15±2.85b | 3.72±0.33c | 29.25±2.50c | 2.22±0.25c | 1.45±0.16c |
30 | 428±11a | 44.69±1.39a | 5.17±0.03a | 42.60±1.16a | 3.15±0.03ab | 2.02±0.05a | |
45 | 429±13a | 42.80±1.59a | 4.40±0.17b | 37.34±2.43b | 3.16±0.07ab | 1.70±0.07b | |
60 | 319±59bc | 32.67±5.77b | 3.32±0.62c | 27.55±4.83c | 2.38±0.29bc | 1.27±0.15c | |
75 | 375±13ab | 34.25±0.83b | 3.50±0.08c | 31.87±0.85c | 3.49±0.93a | 1.44±0.04c | |
毛叶苕子V. villosa | 15 | 2402±303c | 308.09±28.53d | 40.29±5.39c | 277.76±34.84c | 39.60±4.36d | 19.96±2.19d |
30 | 3073±235bc | 358.96±8.97c | 51.65±2.94b | 382.35±27.70b | 55.97±3.15c | 26.30±1.99b | |
45 | 3200±107bc | 356.53±5.29c | 52.62±2.35b | 385.86±16.91b | 86.38±18.84a | 26.51±1.07b | |
60 | 4129±91a | 548.63±13.32a | 67.75±1.59a | 434.72±12.00a | 77.66±1.94ab | 29.38±0.69a | |
75 | 3481±147b | 438.01±24.24b | 48.18±1.61b | 370.42±6.24b | 67.21±2.22bc | 23.15±0.79c | |
冬油菜B. napus | 15 | 324±45c | 29.93±3.20c | 4.36±0.66d | 42.98±5.40d | 7.39±1.01c | 2.03±0.35d |
30 | 1053±45b | 90.46±6.63b | 12.31±0.84c | 106.41±6.20c | 30.42±1.76b | 6.13±0.52c | |
45 | 1843±498a | 161.23±45.00a | 22.57±4.89a | 221.90±55.63a | 50.37±12.91a | 12.18±2.96a | |
60 | 1966±82a | 150.41±4.02a | 17.32±0.59b | 228.23±3.54a | 50.73±2.84a | 9.04±0.31b | |
75 | 1650±101a | 127.29±13.49ab | 16.95±1.38b | 174.71±12.15b | 41.66±2.24a | 8.31±0.38bc | |
肥田萝卜R. sativus | 15 | 2880±245d | 213.73±17.13e | 27.77±2.41e | 308.61±31.82c | 102.19±9.79d | 18.42±2.06d |
30 | 3043±90d | 309.72±19.92d | 41.04±2.27d | 368.84±4.68b | 133.65±2.85c | 25.62±0.77c | |
45 | 4516±175c | 416.74±7.47c | 45.71±1.18c | 388.62±5.48b | 192.86±5.91b | 27.55±1.23bc | |
60 | 5299±266a | 526.30±21.57a | 50.16±2.26b | 519.37±23.90a | 230.51±9.08a | 31.73±1.72a | |
75 | 4873±110b | 489.36±18.11b | 54.85±1.37a | 508.51±3.82a | 202.42±1.78b | 29.49±1.55ab |
绿肥品种 Green manure variety | 养分元素 Nutrient element | 拟合方程 Fitting equation | R2 | P值 P value | 最高积累量的播种量 Corresponding seeding rate (kg·hm-2) | 理论最高积累量 Theoretical maximum accumulation (kg·hm-2) |
---|---|---|---|---|---|---|
鼠茅草 V. myuros | C | y=0.0074x3-1.091x2+47.63x-205.61 | 0.942 | 0.000 | 32.7 | 444.0 |
N | y=0.0006x3-0.093x2+4.034x-8.798 | 0.977 | 0.000 | 31.2 | 45.0 | |
P | y=0.00009x3-0.013x2+0.523x-1.624 | 0.995 | 0.000 | 31.5 | 5.2 | |
K | y=0.0008x3-0.116x2+4.87x-20.432 | 0.998 | 0.000 | 30.7 | 42.7 | |
Ca | y=0.024x+2.134 | 0.172 | 0.321 | - | - | |
Mg | y=0.00004x3-0.005x2+0.217x-0.748 | 0.999 | 0.000 | 32.2 | 2.1 | |
毛叶苕子 V. villosa | C | y=-0.583x2+73.907x+1374.057 | 0.807 | 0.000 | 63.4 | 3716.4 |
N | y=-0.12x2+13.762x+103.627 | 0.785 | 0.001 | 57.3 | 498.2 | |
P | y=-0.015x2+1.575x+18.683 | 0.611 | 0.003 | 52.5 | 60.0 | |
K | y=-0.093x2+9.939x+152.708 | 0.798 | 0.000 | 53.4 | 418.3 | |
Ca | y=-0.029x2+3.163x-4.089 | 0.749 | 0.000 | 54.5 | 82.2 | |
Mg | y=-0.007x2+0.706x+10.972 | 0.760 | 0.000 | 50.4 | 28.8 | |
冬油菜 B. napus | C | y=-0.875x2+102.502x-1079.995 | 0.893 | 0.000 | 58.6 | 1921.9 |
N | y=-0.079x2+8.809x-88.992 | 0.849 | 0.000 | 55.8 | 156.6 | |
P | y=-0.01x2+1.12x-10.427 | 0.806 | 0.000 | 56.0 | 20.9 | |
K | y=-0.109x2+12.37x-132.269 | 0.850 | 0.000 | 56.7 | 218.7 | |
Ca | y=-0.027x2+2.987x-32.445 | 0.904 | 0.000 | 55.3 | 50.2 | |
Mg | y=-0.006x2+0.642x-6.526 | 0.783 | 0.000 | 53.5 | 10.6 | |
肥田萝卜 R. sativus | C | y=-0.593x2+94.997x+1315.474 | 0.840 | 0.000 | 80.1 | 5120.0 |
N | y=-0.084x2+12.642x+29.167 | 0.944 | 0.000 | 75.3 | 504.8 | |
P | y=-0.006x2+0.918x+16.241 | 0.951 | 0.000 | 76.5 | 51.4 | |
K | y=-0.053x2+8.408x+184.218 | 0.938 | 0.000 | 79.3 | 517.7 | |
Ca | y=-0.045x2+6.001x+12.809 | 0.909 | 0.000 | 66.7 | 212.9 | |
Mg | y=-0.005x2+0.664x+9.77 | 0.895 | 0.000 | 66.4 | 31.8 |
表4 4种冬绿肥养分积累量与播种量的关系
Table 4 Relationship between nutrient accumulation and seeding rates of the four winter green manures
绿肥品种 Green manure variety | 养分元素 Nutrient element | 拟合方程 Fitting equation | R2 | P值 P value | 最高积累量的播种量 Corresponding seeding rate (kg·hm-2) | 理论最高积累量 Theoretical maximum accumulation (kg·hm-2) |
---|---|---|---|---|---|---|
鼠茅草 V. myuros | C | y=0.0074x3-1.091x2+47.63x-205.61 | 0.942 | 0.000 | 32.7 | 444.0 |
N | y=0.0006x3-0.093x2+4.034x-8.798 | 0.977 | 0.000 | 31.2 | 45.0 | |
P | y=0.00009x3-0.013x2+0.523x-1.624 | 0.995 | 0.000 | 31.5 | 5.2 | |
K | y=0.0008x3-0.116x2+4.87x-20.432 | 0.998 | 0.000 | 30.7 | 42.7 | |
Ca | y=0.024x+2.134 | 0.172 | 0.321 | - | - | |
Mg | y=0.00004x3-0.005x2+0.217x-0.748 | 0.999 | 0.000 | 32.2 | 2.1 | |
毛叶苕子 V. villosa | C | y=-0.583x2+73.907x+1374.057 | 0.807 | 0.000 | 63.4 | 3716.4 |
N | y=-0.12x2+13.762x+103.627 | 0.785 | 0.001 | 57.3 | 498.2 | |
P | y=-0.015x2+1.575x+18.683 | 0.611 | 0.003 | 52.5 | 60.0 | |
K | y=-0.093x2+9.939x+152.708 | 0.798 | 0.000 | 53.4 | 418.3 | |
Ca | y=-0.029x2+3.163x-4.089 | 0.749 | 0.000 | 54.5 | 82.2 | |
Mg | y=-0.007x2+0.706x+10.972 | 0.760 | 0.000 | 50.4 | 28.8 | |
冬油菜 B. napus | C | y=-0.875x2+102.502x-1079.995 | 0.893 | 0.000 | 58.6 | 1921.9 |
N | y=-0.079x2+8.809x-88.992 | 0.849 | 0.000 | 55.8 | 156.6 | |
P | y=-0.01x2+1.12x-10.427 | 0.806 | 0.000 | 56.0 | 20.9 | |
K | y=-0.109x2+12.37x-132.269 | 0.850 | 0.000 | 56.7 | 218.7 | |
Ca | y=-0.027x2+2.987x-32.445 | 0.904 | 0.000 | 55.3 | 50.2 | |
Mg | y=-0.006x2+0.642x-6.526 | 0.783 | 0.000 | 53.5 | 10.6 | |
肥田萝卜 R. sativus | C | y=-0.593x2+94.997x+1315.474 | 0.840 | 0.000 | 80.1 | 5120.0 |
N | y=-0.084x2+12.642x+29.167 | 0.944 | 0.000 | 75.3 | 504.8 | |
P | y=-0.006x2+0.918x+16.241 | 0.951 | 0.000 | 76.5 | 51.4 | |
K | y=-0.053x2+8.408x+184.218 | 0.938 | 0.000 | 79.3 | 517.7 | |
Ca | y=-0.045x2+6.001x+12.809 | 0.909 | 0.000 | 66.7 | 212.9 | |
Mg | y=-0.005x2+0.664x+9.77 | 0.895 | 0.000 | 66.4 | 31.8 |
绿肥品种 Green manure variety | 鲜重 Fresh weight | 干重 Dry weight | C | N | P | K | Ca | Mg | Vmin | Vmax |
---|---|---|---|---|---|---|---|---|---|---|
鼠茅草 V. myuros | 31.0 | 32.3 | 32.7 | 31.2 | 31.5 | 30.7 | - | 32.2 | 30.7 | 32.7 |
毛叶苕子V. villosa | 59.6 | 53.1 | 63.4 | 57.3 | 52.5 | 53.4 | 54.5 | 50.4 | 50.4 | 63.4 |
冬油菜B. napus | 61.4 | 58.1 | 58.6 | 55.8 | 56.0 | 56.7 | 55.3 | 53.5 | 53.5 | 61.4 |
肥田萝卜 R. sativus | 63.3 | 63.0 | 80.1 | 75.3 | 76.5 | 79.3 | 66.7 | 66.4 | 63.0 | 80.1 |
表5 4种冬绿肥在红壤旱地上的适宜播种量范围
Table 5 Ranges of appropriate seeding rate of the four winter green manures in upland red soil (kg·hm-2)
绿肥品种 Green manure variety | 鲜重 Fresh weight | 干重 Dry weight | C | N | P | K | Ca | Mg | Vmin | Vmax |
---|---|---|---|---|---|---|---|---|---|---|
鼠茅草 V. myuros | 31.0 | 32.3 | 32.7 | 31.2 | 31.5 | 30.7 | - | 32.2 | 30.7 | 32.7 |
毛叶苕子V. villosa | 59.6 | 53.1 | 63.4 | 57.3 | 52.5 | 53.4 | 54.5 | 50.4 | 50.4 | 63.4 |
冬油菜B. napus | 61.4 | 58.1 | 58.6 | 55.8 | 56.0 | 56.7 | 55.3 | 53.5 | 53.5 | 61.4 |
肥田萝卜 R. sativus | 63.3 | 63.0 | 80.1 | 75.3 | 76.5 | 79.3 | 66.7 | 66.4 | 63.0 | 80.1 |
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