施氮量对杂交棉干物质及氮、磷、钾积累和产量与品质的影响  

Effect of nitrogen application rate on accumulation of dry matter and N,P,K in different periods of cotton growth as well as yield and quality of hybrid cotton under high-yield cultivated condition

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

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

出　　处：《河南农业大学学报》2010年第6期625-629,634,共6页Journal of Henan Agricultural University

基　　金：河南省重大科技专项(081100110100-2)

摘　　要：在高产条件下,研究了施氮0,75,150,225,300和375 kg.hm-2对杂交棉豫杂37号在不同生育阶段其干物质和氮、磷、钾的积累及产量和品质的影响.结果表明,增施氮肥显著提高了杂交棉干物质和氮、磷、钾的积累量,特别是显著提高了杂交棉后期干物质与氮、磷、钾的积累量及积累比例.就产量水平看,本试验以施氮量300kg.hm-2的子棉产量最高,比施氮量225 kg.hm-2的增产1.66%,但增产不显著;而施氮量达375 kg.hm-2,其子棉产量比300 kg.hm-2的减产3.92%、比225 kg.hm-2减产2.23%.随施氮量增加,氮肥利用率明显下降,而磷和钾的利用提高.就纤维品质指标看,施氮可以提高纤维长度和纤维比强度,而施氮处理间纤维长度和比强度差别不大,以225 kg.hm-2处理的纤维比强度最大.Effects of nitrogen application rates 0,75,150,225,300 and 375 kg·hm-2 on accumulation of dry matter and N,P,K in different periods of hybrid cotton growth as well as yield and quality were studied under high yield conditions.The results showed that the increased accumulation amount of dry matter and N,P,K in hybrid cotton plants was connected with the increased nitrogen fertilizer,and the increased accumulation proportion was connected with the increased nitrogen fertilizer especially at later stage.In this experiment,The highest yield reached 300 kg·hm-2 treatment increasing by 1.66% compared with 225 kg·hm-2 treatment,but the difference was not significant.when nitrogen rate 375 kg·hm-2 was applied,the seed cotton yield decreased by 2.23% and 3.92% compared with 300 and 225 kg·hm-2,respectively.The nitrogen utilization decreased distinctly while the phosphorus and potassium utilization increased with more nitrogen fertilizer added.The fiber quality was compared and the result indicated that the fiber length was short and fiber strength was weak on the null nitrogen treatment.The fiber length and fiber strength were no significant difference between the different N nutrient treatments.The fiber strength was highest at 225 kg·hm-2 treatment while other index of fiber quality was no difference.

关 键 词：杂交棉 施氮量 干物质 积累量 产量 品质 

分 类 号：S562[农业科学—作物学]