苏丹草-黑麦草轮作制中施肥对饲草产量及养分吸收的影响  

Effect of fertilization on the grass yield,water utilizing and nutrition uptake of Sudangrass and Ryegrass rotation regime

作　　者：李文西[1] 鲁剑巍[1] 杨娟[1] 

机构地区：[1]华中农业大学资源与环境学院,湖北武汉430070

出　　处：《草业学报》2009年第3期165-170,共6页Acta Prataculturae Sinica

基　　金：国际植物营养研究所(IPNI)国际合作项目(Hubei-22)资助

摘　　要：连续2个轮作周期利用盆栽试验研究了苏丹草-黑麦草轮作制度下不同施肥措施对饲草产量及养分吸收的影响。结果表明,氮磷钾肥配合施用(NPK)显著提高了苏丹草、黑麦草产量,2005/2006年度2季饲草鲜产总量为1 690.0 g/盆,分别比不施氮(PK)、不施磷(NK)、不施钾(NP)处理增产700.7%,426.4%和15.9%;2006/2007年度,2季饲草鲜产总量为2 091.3 g/盆,分别比不施氮、不施磷、不施钾处理增产1 256.9%,384.5%和4.4%。氮磷钾肥配施明显促进饲草的养分吸收,2005/2006年度与2006/2007年度饲草氮(N)、磷(P2O5)、钾(K2O)总吸收量分别为6.36,1.83,13.91 g/盆和4.91,2.31,7.64 g/盆,均显著高于其他处理。轮作体系中,NPK处理的氮、磷、钾肥利用率2个年度分别为59.4%,33.9%,96.0%和47.4%,39.8%,43.1%,肥料累积利用率分别达53.4%,36.8%和69.5%。The effect of different fertilization strategies on the grass yield, water utilizing and nutrition uptake of a Sudangrass and Ryegrass rotation regime was studied in a two-year pot experiment. Application of NPK combinations improved the yield of Sudangrass and Ryegrass, and total yield for the two seasons of 2005 and 2006 was 1 690.0 g/pot, which was 700.7%, 426.4%, and 15.9% higher than that of the PK, NK, NP treatments respectively. In 2006 and 2007, totalyield of the two seasons was 2 091.3 g/pot, which was 1 260%, 384. 5% and 4.4% higher than that of the PK, NK, NP treatment respectively. The NPK combination promoted nutrient uptake of N, P2O5, K2O by the forage grasses of 6.36, 1.83, 13.91 g/pot in 2005 and 2006 respectively, and of 4.91, 2.31, 7.64 g/pot in 2006 and 2007. Similarly, fertilizer utilization efficiencies of N,P, K were 59.4%, 33.9%, 96.0% in the first rotation and 47.4%0, 39.8%, 43.1% in the second rotation giving an average fertilizer utilizing efficiency of 53.4%, 36.8%, 69. 5%.

关 键 词：苏丹草-黑麦草轮作 氮磷钾肥 养分吸收 肥料利用率 

分 类 号：S54[农业科学—作物学]