施氮量对杂交水稻产量构成因素和干物质积累的影响  

Effects of Amount of N-fertilizer on Yield Constitution and Dry Matter Accumulation of Hybrid Rice

作　　者：杨益花[1] 张亚洁[2] 苏祖芳[2] 

机构地区：[1]苏州农业职业技术学院,江苏苏州215008 [2]扬州大学农学院,江苏扬州225009

出　　处：《天津农学院学报》2005年第1期5-8,30,共5页Journal of Tianjin Agricultural University

基　　金：江苏省农业三项工程项目"水稻定量施肥技术研究"[s(01)205]

摘　　要：以杂交中籼稻两优培九、丰优香占、汕优63为材料,研究施氮量对杂交水稻产量构成因素和干物质积累的影响。结果表明:产量随施氮量的增加而提高,当施氮量增加到150kg·hm-2时,产量最高,再增加施氮量,产量下降;穗数随施氮量的增加而上升,达一定值下降;每穗粒数随施氮量增加而增加;施氮量对千粒重的影响不明显;干物质积累量,拔节期、抽穗期随施氮量的增加而增加,成熟期随施氮量增加到150kg·hm-2时干物质积累最高,再增施氮肥后下降,移栽至拔节期、拔节至抽穗期干物质积累占总干物质重的比重随着施氮量增加而提高,而抽穗至成熟期则随着施氮量增加先上升后下降,有一个适宜值。With mid-season Indica hybrid Liangyoupeijiu, Fengyouxiangzhan and Shanyou 63 as materials, the effects of amount of N-fertilizer (ATNF) on yield constitution and dry matter accumulation of hybrid rice were studied. The results are as follows. The yield of Indica increased with the increase of ATNF, and it reached the maximum when the ATNF was added to 150 kg·hm^(-2), and it would decline if going on adding the ATNF. Panicle numbers of per hm^2 increased with the increase of ATNF, and it would decline when the ATNF arrived some value. Grain numbers per panicle of Indica increased with the increase of ATNF. There were no significant effects of ATNF on 1000-grain weight among varieties of rice. The amount of the accumulation of dry matter increased with the increase of ATNF during jointing and heading stage, and it would reach the maximum when the ATNF was added to 150 kg·hm^(-2), but it would decline if going on adding the ATNF during maturing stage. The proportion of the accumulation of dry matter in total dry weight increased with the increase of ATNF during transplanting to jointing and jointing to heading stage. But the proportion firstly increased and then decreased during heading to maturing stage and there was a suitable value.

关 键 词：水稻 施氮量 产量构成因素 干物质积累与分配 

分 类 号：S511.21[农业科学—作物学] S511.062