华北农学报2012，Vol.27Issue(2)：189-195,7.
不同降水条件下北方日光温室填闲季糯玉米对土壤残留氮风险阻控研究
Study on Reducing for Planting Summer Catchcrop-Waxy Corn Soil Residual Nitrogen Risk under Different Rainfall in the Northern Greenhouse
摘要
Abstract
Excessive fertilizer and irrigation input was common in greenhouse vegetable cropping system in North China,which seriously affected the sustainable development of protected vegetable production. In fallow season, there were two treatments in the experiment:control (with no crop) and planting catch crop. Bromine-marked tracing was used to the waxy corn roots sampling,to further verify the role of cultivating the catch crop in reducing nitrogen loss. The main results showed that under the experimental conditions, the cultivation of catch crops could significantly reduce the soil N^,, content,especially in the surface soil Nojll content. Under simulated drought conditions treatment, with catch crops planted at the harvest ending,a decrease of Nmincontent could be found in 0 - 120 cm soil layers. In the follow treatment with all layers from 0 to 180cm,soil N^. Content all increased, this meaned that in the period of trail soil nitrogen had mineralization in different degree. Through different rainfall simulations, showed that a large amount of rainfall in summer was a key factor of soil nitrogen leaching,and soil Nmm content of the higher volume of higher nitrogen leaching. Catch crops could effectively absorb the nutrients in the soil,to simulate rainfall of drought year treatment nitrogen removed by waxy corn was 172. 6 kg/hm2, and then the rainfall of the year treatment waxy com could taken away nitrogen reached 146.6 kg/hm2. Bromine-marked trail had turnout the capacity of catch crops for nitrogen,in this trail the bromide in lower soil layer all have upward migration. This research confirmed that planting catchcrop-waxy corn was advantageous to use soil residual nitrogen and reduce nitro-gen leaching risk,which provided scientific references for optimizing nitrogen management in typical planting model of northern greenhouse.关键词
填闲/糯玉米/硝酸盐淋洗/日光温室Key words
Catch/ Waxy corn/ Nitrogen leaching/ Greenhouse分类
农业科技引用本文复制引用
卢树昌,姜春光..不同降水条件下北方日光温室填闲季糯玉米对土壤残留氮风险阻控研究[J].华北农学报,2012,27(2):189-195,7.基金项目
天津市应用基础及前沿技术研究计划项目(09JCYBJC08600) （09JCYBJC08600）
国家自然科学基金(30671236) （30671236）
天津市农业科技成果转化与推广项目(0804140) （0804140）
