氮钾配合施用对短季棉光合特性和产量品质的影响  

Effects of N and K on Photosynthetic Characteristics and Yield & Fiber Quality of Short-Season Cotton

作　　者：李伶俐[1] 房卫平[2] 马宗斌[1] 谢德意[2] 杜远仿[3] 张东林[3] 

机构地区：[1]河南农业大学农学院,郑州450002 [2]河南省农业科学院经济作物研究所,郑州450002 [3]河南省开封县棉花办公室,开封475100

出　　处：《棉花学报》2008年第5期379-384,共6页Cotton Science

基　　金：河南省重大科技攻关(0322010800)

摘　　要：大田条件下,采用施尿素225kg.hm-2、300kg.hm-2两个水平和施氯化钾0kg.hm-2、120kg.hm-2、195kg.hm-2三个水平,研究了不同组合对短季棉光合特性和产量品质的影响。结果表明,在相同施钾水平下,高氮比低氮的叶片光合能力和产量略有提高,高氮比低氮的增产效应随钾量的增加而增加,氮肥的肥效随钾肥的增加而明显提高;在相同施氮水平下,2个施钾的比不施钾的光合能力、产量和纤维品质均显著提高;不同施钾处理间子棉产量差异极显著;本试验条件下,以尿素300kg.hm-2、氯化钾195kg.hm-2组合产量最高。在充足的氮肥条件下,保证适量钾肥的供应,维持氮钾平衡对提高短季棉的氮肥利用效率、产量和纤维品质极为重要。Effects of nitrogen and potassium fertilizer on photosynthetic characteristics and yield quality of short-season cotton were studied under field experiments. Two urea （N） levels 225 kg·hm^-2 and 300 kg·hm^-2 and three KC1 （K） levels 0 kg ·hm^-2,120 kg ·hm^-2 and 195 kg ·hm^-2 were used in the experiments. The results indicated that photosynthetic capability in leaves of cotton and yield were higher applied more N than less N under the same K levels, and N utilize efficiency increased when applying more K. Meanwhile, photosynthetic capability in leaves of cotton , yield and quality was higher applied K than no K under the cantly different when applying different K levels. 300 kg·hm^-2 and KCl 195 kg·hm^-2 under this experiments condition. So, supplying suitable K tokeep balance of N and K is extremely important to improve N utilize efficiency, yield and quality of cotton under enough N.

关 键 词：氮 钾组合 光合特性 产量 品质 

分 类 号：S562[农业科学—作物学]