播量对麦后复种油菜生物产量及耕层土壤养分的影响  

Effects of Seeding Rate on Rapeseed Biological Yield and Soil Nutrient in Wheat Stubble Multiple Cropping Rape

作　　者：杨文元[1] 李腾飞 董博[3,4] 赵记军 郭天文[3] 张东伟[3] 董青松 曾骏[3] 

机构地区：[1]古浪县农业技术推广中心,甘肃武威733100 [2]巴中市水利基本建设工程质量监督站,四川巴中636600 [3]甘肃省农业科学院旱地农业研究所/甘肃省旱作区水资源高效利用重点实验室,兰州730070 [4]甘肃省智慧农业工程技术研究中心,兰州730070 [5]甘肃省农业生态环境保护管理站,兰州730000

出　　处：《西北农业学报》2017年第4期583-587,共5页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家科技支撑计划(2012BAD05B03);农业部行业专项计划(201503120)~~

摘　　要：为明确西北地区播量对麦后复种油菜地耕层土壤养分变化的影响,在甘肃省古浪县进行小区试验,研究不同播量(7.5、11.25、15.0、18.75和22.5kg/hm^2)对油菜生物产量和耕层土壤养分的影响,提出适宜的播种量。结果表明:油菜生物产量随着播种量的增加先增加后降低,在播种量15.0kg/hm^2时达最大;麦后复种油菜可提高土壤有机质质量分数,增强土壤速效磷的解吸,根系分泌的有机酸类物质可降低土壤pH;麦后复种油菜显著降低土壤速效钾质量分数,应注意补施钾肥。In order to clarify effect of seeding rate on soil nutrient change of soil nutrient under wheat stubble multiple cropping rape in northwest region,a plot expriment was conducted to examine effects of yield and soil environment of pH ,organic matter, available N, available P, available K in Gulang country. Six treatments（CK,T1,T2,T3,T4,T5） were designed with seeding rate of 7. 5 kg/hm^2, 11.25 kg/hm^2 ,15.0 kg/hm^2,18. 75 kg/hm^2 and 22.5 kg/hm^2. The results showed that the yield of rape was highest at 15.0 kg/hm2. The rape yield increased with increase of seeding rate. Wheat stubble multiple cropping rape could improve the content of soil organic matter,increase soil available P desorption,root secretion of organic acids material could reduce the soil pH; wheat stubble multiple cropping rape significantly reduced the soil available potassium mass fraction, we should pay attention to complement potassium application.

关 键 词：麦后复种 生物产量 养分 油菜 

分 类 号：S565.4[农业科学—作物学]