摘要
以华中地区菜地土壤的典型蔬菜为研究对象,通过田间试验,分析了不同氮处理水平下的蔬菜产量和硝酸盐含量。试验结果表明,随着氮肥施用量的增加,蔬菜产量先增加后降低。蔬菜体内硝酸盐含量随氮肥施用量的增加而增加,二者呈显著正相关,不同蔬菜硝酸盐含量变化为：小白菜〉菠菜和萝卜〉辣椒。在综合考虑蔬菜产量及硝酸盐含量的基础上,不同蔬菜作物最佳施氮量范围为,秋季小白菜180~270 kg/hm2,冬季菠菜40~80 kg/hm2,春夏季早辣椒150~300 kg/hm2,秋萝卜120~180 kg/hm2。不同季节蔬菜产量差异较大,春季产量要明显高于秋冬季。
Taking the typical vegetables in central China as materials, this paper studied the effects of different nitrogen treatments on yield and nitrate content of vegetables. The results showed that, with the increase of the nitrogen application dose, the vegetable yield increased firstly and then decreased. The vegetable nitrate content increased as the nitrogen application dose increased, and they were significantly positive relevant. The vegetable nitrate content during the trail period was as follows： Chinese cabbage〉spinach and radish〉pepper. Considering the yield and nitrate content of vegetables comprehensively, the optimum nitrogen application doses were 180-270 kg/hm2, 40-80 kg/hm2, 150-300 kg/hm2 and 120- 180 kg/hm2 for autumn Chinese cabbage, winter spinach, spring and summer pepper and autumn radish respectively. There were obvious differences among vegetable yield in different seasons, and the yield in spring was significantly higher than those in autumn and winter.
出处
《长江蔬菜》
2012年第14期71-77,共7页
Journal of Changjiang Vegetables
基金
农业部"948"项目"氮淋失预测模型引进及其在菜地氮营养管理上的应用"(2003-Z54)
山东省科学院博士基金(科基合字(2010)第20号)
国家重大科技水专项(2009ZX07210-009)
关键词
氮处理
菜地土壤
蔬菜产量
硝酸盐含量
Nitrogen treatment
Soil of vegetable field
Vegetable yield
Nitrate content
