全国肥料联合试验江西点2009年研究结果  

The Result of National Fertilizer Joint Test of Jiangxi Point in 2009

作　　者：郝良光[1] 夏绍南[1] 张允昔[1] 肖远龙[1] 杨绍群[1] 杨军[1] 柯兴盛[1] 

机构地区：[1]江西省棉花研究所,江西九江332105

出　　处：《江西棉花》2010年第2期12-18,共7页Jiangxi Cottons

基　　金：国家公益性行业科研专项:棉花简化种植节本增效生产技术研究与应用(3-5-14)

摘　　要：通过江西点2009年实施全国肥料联合试验，结果表明：在磷钾肥施用水平相同的情况下。不同的施氮水平对产量度效益影响较大．从经济实用角度出发，以施纯氮300kg／hm^2水平上配合施用有机肥最佳。试验处理的纯氮投入增效为14．09—31．20元/kg。随着氮肥施用量的增加，其氮肥利用率降低。处理2到处理5氮肥利用率依次为：16．95％、14．07％、10．2％、5．44％，处理6与处理3相当且略高。同时．施氮还能提高棉纤堆长度和断裂比强度，对改善纤维品质有一定作用。氮肥利用率（y）与氮肥施用量（x）呈显著的（y=164．888-0．4397x）直线负相关。Through the national fertilizer joint test of Jiangxi point in 2009, results showed that： different nitrogen levels were greater impact on the yield and benefit in the case of the same level phosphate and potassium, from the view of economic and practical point, application of 300 kg / hm^2 level nitrogen with the organic fertilizer was the best. increasing efficiency was14.09 - 31.20 yuan / kg of the nitrogen, With the increase of nitrogen fertilizer, nitrogen utilization was reduced, the nitrogen utilization of treatment 2 to treatment 5 were： 16.95%, 14.07% 10.2%, 5.44%, treatment 6 and 3 were higher. Meanwhile, the nitrogen can improve cotton fiber length and fracture strength, have a certain effect on improving the fiber quality.

关 键 词：棉花 肥料 产量 效益 氮肥利用率 

分 类 号：S562.062[农业科学—作物学]