渭北旱原甘蓝型油菜优化栽培技术研究

The Optimal Cultivation Technique of Brassica napus. L Rape Plant on Weibei Rainfed Highland

多因子栽培试验及反馈验证结果表明，目前陕西渭北旱原甘蓝型油菜亩产１５０ｋｇ以上较优农艺措施方案为：肥力较高的陕西省西部播期８月３０日～９月５日，密度每亩１．４～１．６万株，亩施纯Ｎ１０．５～１０．８ｋｇ，亩施纯Ｐ２Ｏ５５．５ｋｇ，喷施１００～１５０ｍｇ／ｋｇ的多效唑进行化控；肥力较低的陕西省东部，播期８月２７～３０日，密度每亩１．６～１．８万株，亩施纯Ｎ１３．９～１５．５ｋｇ，亩施Ｐ２Ｏ５８．７～９．５ｋｇ。

The results from multiple factor cultivation trials and feedback testification showed that in the case of more than 150 kg/mu of Brassica napus.1 rape cultivated on Weibei rainfed highland in Shaanxi,the optimal agronomic technical measure scheme can be as follows:sowing date in the west Shaanxi where land is in high fertility can be from August 10 to Semptember 5;plant density is 14000～16000 plants per mu;Pure N application per mu is 10.5～10.8 kg;P 2O 5 application per mu is 5.5 kg;and 100～150 mg/kg of PP 333 can be sprayed to carry out chemical control.Sowing date in the east Shaanxi where land is in low fertility can be August 27～30;plant density is 16000～18000 plants per mu;Pure N application per mu is 13.9～15.5 kg; P 2O 5 application per mu is 8.7～9.5 kg; and it is unsuitable to use PP 333 for chemical control.