密度和氮肥对寒地粳稻生长发育及产量的影响  

Effect of Transplanting Density and Nitrogen Amount on Growth and Yield of Japonica Rice in Cold Region

作　　者：孙羽[1] 王曼力[1] 王麒[1] 宋秋来[1] 曾宪楠[1] 冯延江[1] 

机构地区：[1]黑龙江省农业科学院耕作栽培研究所,黑龙江哈尔滨150086

出　　处：《黑龙江农业科学》2015年第8期22-25,共4页Heilongjiang Agricultural Sciences

基　　金："十二五"国家科技支撑计划--国家粮食丰产科技工程资助项目(2011BAD16B11);黑龙江省科学基金资助项目(C2015030);哈尔滨市科技局创新人才研究专项资金资助项目(2014RFQGJ044)

摘　　要：为了进一步提高水稻产量,以龙香稻2号为材料,研究不同的栽插密度和施氮量对龙香稻2号生长发育及产量结构的影响。结果表明：随着施氮肥量的增加,分蘖期、抽穗期和成熟期推迟1~2d。种植密度小处理比密度大处理生育期延迟2~4d;密度和氮肥对水稻有效分蘖数有直接影响,低密度条件下（15.00万穴·hm^-2）适当施用氮肥可促进大量分蘖而提高有效分蘖;密度和氮肥对水稻产量的影响主要通过影响有效分蘖数和穗粒数实现;龙香稻2号的最佳氮肥和密度配比方案为：密度16.67万穴·hm^-2,尿素160kg·hm^-2,产量为8 001kg·hm^-2。In order to further increase rice yield, taking rice variety Longjing 2 as experimental material,effect of different transplanting density and nitrogen amount on growth and yield of cold land Japonica rice were studied. The results showed that with increasing of nitrogen amount, tillering stage, heading stage , mature stage delayed 1-2 d,the growth stage of the treatment with low planting density delayed 2-4 d than treatment with high planting density. Highest number of effective tillers was found in treatment with 160 kg·hm^-2nitrogen amount under low transplanting density. Effects of transplanting density and nitrogen amount on rice yield primarily by affecting the number of effective tillers and grain number. The regime for highest yield was density of 166 700 hole per hectare and suitable nitrogen application amount （160 kg·hm^-2）. Under this condition,trans- planting density and nitrogen amount interaction had significant positive effect on yield.

关 键 词：栽插密度 施氮量 粳稻 产量 

分 类 号：S511.22[农业科学—作物学]