| 苏丹草-黑麦草轮作制中氮磷钾肥施用对饲草产量和养分吸收的影响 |
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| 引用本文： | 李小坤,鲁剑巍,陈防,赵慧星,李文西.苏丹草-黑麦草轮作制中氮磷钾肥施用对饲草产量和养分吸收的影响[J].土壤,2007,39(6):900-904. |
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| 作者姓名： | 李小坤 鲁剑巍 陈防 赵慧星 李文西 |
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| 作者单位： | 1. 华中农业大学资源与环境学院,武汉,430070
2. 中国科学院武汉植物园,武汉,430074 |
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| 基金项目： | 加拿大钾磷研究所国际合作项目;华中农业大学人才启动基金 |
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| 摘 要： | 利用盆栽试验研究了苏丹草-黑麦草轮作中N、P、K肥施用对饲草的产量、养分吸收及土壤性质的影响.结果表明:N、P、K肥的施用可分别使饲草鲜草产量提高6.1倍、1O.6倍和O.6倍,各处理差异均达显著水平.N肥施用后饲草对N、P和K的吸收量与不施N处理相比分别提高6.9倍、3.5倍和4.7倍;P肥施用后饲草对N、P和K的吸收量与不施P处理相比分别提高5.9倍、23.2倍和7.3倍;K肥施用后饲草对N,P和K的吸收量与不施K处理相比分别提高O.3倍、O.7倍和7.4倍.N、P、K肥的施用可相互促进肥料表观利用率的提高.P、K肥的施用有利于缓解土壤酸化,轮作后各处理土壤有机质含量无显著差异,缺P处理的土壤NH4 -N含量明显较高,施N处理土壤中P含量明显降低,缺N、缺P处理轮作后土壤K含量明显高于其他处理.
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| 关 键 词： | 苏丹草 黑麦草 氮磷钾肥 产量 养分积累量 土壤肥力 |
Effect of N, P and K Fertilizers on Yield and Nutrient Absorption of Forage in Sudangrass/Ryegrass Rotation |
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| LI Xiao-kun,LU Jian-wei,CHEN Fang,ZHAO Hui-xing and LI Wen-xi.Effect of N, P and K Fertilizers on Yield and Nutrient Absorption of Forage in Sudangrass/Ryegrass Rotation[J].Soils,2007,39(6):900-904. |
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| Authors: | LI Xiao-kun LU Jian-wei CHEN Fang ZHAO Hui-xing and LI Wen-xi |
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| Institution: | College of Resources and Environmental Sciences, Huazhong Agricultural University, Wuhan 430070, China,College of Resources and Environmental Sciences, Huazhong Agricultural University, Wuhan 430070, China,Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China,College of Resources and Environmental Sciences, Huazhong Agricultural University, Wuhan 430070, China and College of Resources and Environmental Sciences, Huazhong Agricultural University, Wuhan 430070, China |
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| Abstract: | A pot experiment was conducted to study the effect of nitrogen (N), phosphors (P) and potassium (K) application on the yield and nutrient absorption of forage in sudangrass/ryegrass rotation which is popular in Jianghan Plain for fishing industry. The results showed that fresh forage yield in the treatment with N, P and K fertilization increased by 6.1, 10.6 and 0.6 times respectively, compared with no N, P and K treatments. The nutrient absorption amount result indicated N application received 6.9, 3.5 and 4.7 times more N, P and K amount, P application received 5.9, 23.2 and 7.3 times more N, P and K amount, and K application received 0.3, 0.7 and 7.4 times more N, P and K amount, respectively. The result suggested that N, P and K combined fertilization could improve apparent fertilizer utilizing efficiency mutually. P and K fertilization could reduce soil acidification. The soil organic matter among different treatments was not different significantly after the experiment. The soil NH4 -N content in NK Treatment (no P) was obviously higher than other treatments, available P content with N fertilization was significantly lower than other treatments, and available K contents in PK and NK Treatment were significantly higher than other treatments. |
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| Keywords: | Sudangrass Ryegrass NPK fertilizer Yield Nutrient accumulation amount Soil fertility |
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