摘要
为了倡导"节本增效、产品优质、环境友好"的蔬菜生产模式,以精纯改良青杂十三号大白菜为材料,进行了"2+X"氮肥总量控制肥效试验。结果表明:在磷钾肥供应水平一致以及氮肥施用量低于21.79 kg/667m^2的条件下,白菜产量随施氮量的增加而增加,呈正相关;在施氮量超过21.79 kg/667m^2时,产量随施氮量的增加而减少,呈负相关;同时,建立了氮肥效应的一元二次回归模型:Y=5 603.692+120.117N-4.213N^2。
In order to promote the vegetable production mode of ＂cost-saving and efficiency-increasing, good quality products, and environmental friendly＂, a fertilizer effect experiment of total nitrogen fertilizer control, ＂2＋X＂ was conducted with Pure Improved Qingza Chinese cabbage No.13 as the test material. The results showed that under the condition with the same level of phosphorus, potassium and nitrogen fertilizer supply and an application rate of nitrogen fertilizer lower than 21.79 kg/667m^2, the yield of Chinese cabbage improved with the increase of nitrogen application rate, which were positively correlated; when the application rate of nitrogen fertilizer exceeded 21.79 kg/667m^2, the yield decreased with the increase of nitrogen application rate, which had negative correlation; at the same time, a unary quadratic regression model of nitrogen fertilizer effect was established： Y=5 603.692＋120.117N-4.213N^2.
出处
《湖南农业科学》
2016年第2期48-50,共3页
Hunan Agricultural Sciences
基金
湖南省蔬菜测土配方施肥项目(2014)
关键词
氮素
大白菜
产量
效益
nitrogen
Chinese cabbage
yield
benefit
