Acta Prataculturae Sinica ›› 2021, Vol. 30 ›› Issue (8): 36-48.DOI: 10.11686/cyxb2020292
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Jing-dong ZHAO(), Yan-tao SONG(), Xin-lei XU, Wuyunna
Received:
2020-06-24
Revised:
2020-08-04
Online:
2021-07-09
Published:
2021-07-09
Contact:
Yan-tao SONG
Jing-dong ZHAO, Yan-tao SONG, Xin-lei XU, Wuyunna. Effects of nitrogen application and mowing on yield and quality of forage in degraded grassland in northwest Liaoning Province[J]. Acta Prataculturae Sinica, 2021, 30(8): 36-48.
指标 Index | 年份 Year (Y) | 施氮 Fertilization (F) | 刈割 Mowing (M) | 年份×施氮 Y×F | 年份×刈割 Y×M | 施氮×刈割 F×M | 年份×施氮×刈割 Y×F×M |
---|---|---|---|---|---|---|---|
粗蛋白CP | ns | *** | ns | ** | ns | ** | ns |
粗灰分Ash | ns | ** | ** | ns | ns | ** | ns |
木质素Lignin | ** | ns | ns | ns | ns | ns | ns |
粗脂肪EE | * | ns | * | ns | ns | ns | ns |
可溶性碳水化合物 WSC | ns | ns | ns | ns | ns | ns | ns |
非纤维性碳水化合物 NFC | ** | ns | * | ns | ns | ns | ns |
酸性洗涤纤维ADF | * | *** | ns | * | ns | ns | ns |
中性洗涤纤维NDF | * | ns | ** | ns | ns | ns | ns |
Table 1 Variance analysis of nutrient composition content of herbage by nitrogen application and mowing in 2018 and 2019
指标 Index | 年份 Year (Y) | 施氮 Fertilization (F) | 刈割 Mowing (M) | 年份×施氮 Y×F | 年份×刈割 Y×M | 施氮×刈割 F×M | 年份×施氮×刈割 Y×F×M |
---|---|---|---|---|---|---|---|
粗蛋白CP | ns | *** | ns | ** | ns | ** | ns |
粗灰分Ash | ns | ** | ** | ns | ns | ** | ns |
木质素Lignin | ** | ns | ns | ns | ns | ns | ns |
粗脂肪EE | * | ns | * | ns | ns | ns | ns |
可溶性碳水化合物 WSC | ns | ns | ns | ns | ns | ns | ns |
非纤维性碳水化合物 NFC | ** | ns | * | ns | ns | ns | ns |
酸性洗涤纤维ADF | * | *** | ns | * | ns | ns | ns |
中性洗涤纤维NDF | * | ns | ** | ns | ns | ns | ns |
指标 Index | 年份 Year (Y) | 施氮 Fertilization (F) | 刈割 Mowing (M) | 年份×施氮 Y×F | 年份×刈割 Y×M | 施氮×刈割 F×M | 年份×施氮×刈割 Y×F×M |
---|---|---|---|---|---|---|---|
Ca | ns | ns | ** | ns | ns | ns | ns |
P | ns | ns | *** | ns | ns | ns | ns |
K | * | ns | ns | ns | ns | ns | ns |
Mg | ns | ns | * | ns | ns | ns | ns |
Table 2 Variance analysis of the content of mineral elements in herbage by nitrogen application and mowing in 2018 and 2019
指标 Index | 年份 Year (Y) | 施氮 Fertilization (F) | 刈割 Mowing (M) | 年份×施氮 Y×F | 年份×刈割 Y×M | 施氮×刈割 F×M | 年份×施氮×刈割 Y×F×M |
---|---|---|---|---|---|---|---|
Ca | ns | ns | ** | ns | ns | ns | ns |
P | ns | ns | *** | ns | ns | ns | ns |
K | * | ns | ns | ns | ns | ns | ns |
Mg | ns | ns | * | ns | ns | ns | ns |
指标 Index | 年份 Year (Y) | 施氮 Fertilization (F) | 刈割 Mowing (M) | 年份×施氮 Y×F | 年份×刈割 Y×M | 施氮×刈割 F×M | 年份×施氮×刈割 Y×F×M |
---|---|---|---|---|---|---|---|
可消化中性洗涤纤维dNDF | * | ns | ns | ns | ns | ns | ns |
中性洗涤纤维消化率NDFD | ns | ns | ns | ns | ns | ns | * |
体外干物质消化率IVDMD | ** | ns | ** | ns | ns | ns | ns |
产奶净能NEL | ns | * | * | ns | ns | * | ns |
维持净能NEm | ns | * | ** | ns | ns | ns | ns |
增重净能NEg | ns | * | ** | ns | ns | ns | ns |
奶吨指数MT | ns | * | * | ns | ns | * | ns |
总可消化养分 TDN | ns | * | ** | * | ns | ns | ns |
相对饲草品质 RFQ | ns | ns | ** | ns | ns | ns | ns |
相对饲喂价值 RFV | ns | ns | ** | ns | ns | ns | ns |
Table 3 Analysis of variance of feed value content of herbage by nitrogen application and mowing in 2018 and 2019
指标 Index | 年份 Year (Y) | 施氮 Fertilization (F) | 刈割 Mowing (M) | 年份×施氮 Y×F | 年份×刈割 Y×M | 施氮×刈割 F×M | 年份×施氮×刈割 Y×F×M |
---|---|---|---|---|---|---|---|
可消化中性洗涤纤维dNDF | * | ns | ns | ns | ns | ns | ns |
中性洗涤纤维消化率NDFD | ns | ns | ns | ns | ns | ns | * |
体外干物质消化率IVDMD | ** | ns | ** | ns | ns | ns | ns |
产奶净能NEL | ns | * | * | ns | ns | * | ns |
维持净能NEm | ns | * | ** | ns | ns | ns | ns |
增重净能NEg | ns | * | ** | ns | ns | ns | ns |
奶吨指数MT | ns | * | * | ns | ns | * | ns |
总可消化养分 TDN | ns | * | ** | * | ns | ns | ns |
相对饲草品质 RFQ | ns | ns | ** | ns | ns | ns | ns |
相对饲喂价值 RFV | ns | ns | ** | ns | ns | ns | ns |
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