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甘蓝在我国居民的蔬菜消费量中占有重要地位,江津区吴滩镇无公害蔬菜基地是重庆市江津区最大的甘蓝种植基地。近年来,随着化学肥料的大量投入,土壤酸化严重,土体富营养化。基于此,通过开展氮肥总量控制试验,力图探索合理的肥料投入量,并为土壤酸化改良寻找适宜的途径。1材料与方法1.1供试土壤与作物试验地位于重庆市江津区吴滩镇金子社区12社,地名大田堡,农户名王真贵,经度106.096°,纬度29.258°,海拔277m,土壤为沙溪庙组紫泥田,土层较厚,中壤,pH 4.8,有机质16.400 g/kg,碱解氮82.2 mg/kg,有效磷18.5
Cabbage occupies an important position in the vegetable consumption of our residents. Wujin Town, Jiangjin District, is the largest base of cabbage planting in Jiangjin District of Chongqing. In recent years, with a large number of chemical fertilizer inputs, soil acidification, soil eutrophication. Based on this, through the total amount of nitrogen fertilizer control experiments, trying to explore a reasonable amount of fertilizer inputs, and find suitable ways for the improvement of soil acidification. 1 Materials and Methods 1.1 Soil and Crops for Testing The experimental sites were located in No.12 Community of Jinzi Community, Wu Tan Town, Jiangjin District, Chongqing Municipality. The place name was Da Tian Fort, and the real name was Wang Zhenui. The longitude was 106.096 °, the latitude was 29.258 ° and the elevation was 277m. Purple soil, thick soil, medium soil pH 4.8, organic matter 16.400 g / kg, nitrogen 82.2 mg / kg, available phosphorus 18.5