新疆旱寒区不同种植密度对超强抗寒冬油菜光合生理及产量的影响  

Effects of Plant Density on Photosynthetic Characteristics and Yield of Cold Resistance Winter Rapeseed in Dry and Cold Areas of Xinjiang

作　　者：李强[1] 顾元国[1] 张艳红[2] 张乐[3] 贾东海[1] 王娟[1] 陈跃华[1] 

机构地区：[1]新疆农业科学院经济作物研究所,乌鲁木齐830091 [2]新疆农业科学院拜城试验站,新疆拜城842300 [3]吉林市农业科学院,吉林吉林132101

出　　处：《西北农业学报》2014年第11期62-69,共8页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：新疆农业科学院优秀青年科技人才基金(Xjnky-2012-008);新疆维吾尔自治区财政厅三院基金(SY12006);农业部公益性行业(农业)科研专项经费(200903002-04);国家油料产业技术体系(CARS-13)乌鲁木齐综合试验站

摘　　要：对新疆旱寒区不同种植密度下冬油菜干物质积累、光合生理及产量进行研究。结果表明,冬油菜群体干物质积累呈现Logistic曲线变化,干物质积累速率呈单峰曲线变化,群体干物质积累随密度增加而增加。种植密度影响冬油菜光合特性及干物质积累,并最终影响产量。种植密度为30×10^4-60×10^4株/hm^2时,随种植密度的增加,冬油菜的光合生理指标提高,进而增加油菜产量,但种植密度高于60×10^4株/hm^2时,随种植密度增加其产量呈逐渐降低的趋势。The winter rapeseed dry-matter accumulation,photosynthetic and yield with different plant densities in dry and cold areas of Xinjiang were studied.The results showed the process of the winter rapeseed dry-matter accumulation could be simulated with Logistic curve.Speed of dry-matter accumulation showed a single peak curve.With the increase of density the dry-matter accumulation decreased.Plant density had certain influence on photosynthetic characteristics,dry-matter accumulation and yield of winter rapeseed.Under planting density of 30×10^4-60×10^4 plant/hm^2,the photosynthetic indexes and yield of winter rapeseed increased with the increasing density.But when the planting density was up to 60×10^4 plant/hm^2,the yield reduced with the increased planting density.

关 键 词：旱寒区 冬油菜 种植密度 光合生理 产量 

分 类 号：S565.4[农业科学—作物学]