施氮对高丹草产量及氮素利用分配的影响  

Effects of fertilizer N on yield and distribution of nitrogen of Sorghum hybrid and accounting on the economic benefit

作　　者：韩娟[1] 刘大林[1] 赵国琦[1] 杨跃霞[1] 王小山[1] 

机构地区：[1]扬州大学动物科学与技术学院,草业科学专业江苏扬州225009

出　　处：《草业科学》2010年第3期93-97,共5页Pratacultural Science

基　　金：2007年公益性行业(农业)科研专项资助项目(ny-hyzx07-022)

摘　　要：试验通过N0、N90、N180、N270、N3605个施氮处理,采取随机区组设计,研究了江苏扬州地区不同氮肥施用量对高丹草Sorghum hybrid株高、茎叶比、产量及其不同器官的氮素分配的影响,并对其经济效益进行核算。试验结果表明:施氮肥可明显增加高丹草种植的经济效益,2008年增收最高达6 046元/hm2;产量与株高均随着施氮量的增加而增加,第1茬在处理N360最高,第2茬和第3茬在处理N270时最高,而施肥对茎叶比的作用主要在第2茬;高丹草植株全氮多集中在叶片,高氮处理大于低氮处理,不同器官的全氮含量叶片>全株>茎>叶鞘。Based on the randomized block design for five nitrogen fertilizer levels of N0, N90, N180, N270, N360. Effects of fertilizer N on the height, the stem/leaf, yield and the organic distribution of nitrogen on Sorghum hybrid in Yangzhou region of Jiangsu province were studied, at the same time the economic benefit was accounted. The results indicated that application of nitrogen fertilizer increased the economic benefit significantly. The highest increase was 6 046 yuan/hm^2 in 2008. The yield and plant height increased with the increase of nitrogen fertilizer, the fertilizer of N360 was the largest amount in the first crop and the fertilizer of N270 was the largest amount in the second and third crop. However, the effects of the nitrogen fertilizer on the stem/leaf mostly perform the znd harrest stage. The total nitrogen of S. hybrid concentrated mostly on the leaf, and the high fertilizer N treatment was larger than the low fertilizer N. The contents of total nitrogen in different organs varied as the leaf〉 the whole plant〉stem〉 sheath.

关 键 词：高丹草 施氮 株高 产量 全氮 经济效益 

分 类 号：S544.9[农业科学—作物学]