土壤Issue(3)：37-42,6.DOI:10.11838/sfsc.20160306
不同轮作模式农田钾养分表观平衡及其对土壤速效钾含量的影响
Potassium nutrient balance and its impact on soil available K content in Shanghai suburb farmlands
摘要
Abstract
Potassium nutrient balances of the farmland soils in 50 varieties of crops and 5 types of rotation and its impact to soil available K nutrient content were studied in 43 site-specific locations over the past three years in Shanghai suburb. The result indicated that: ( 1 ) the potassium nutrient surplus tendency of different crops farmland was: the fewflower wildrice, the fruit>the vegetables≥the greensward>the crops;The potassium nutrient surplus of different rotation farmland was: the rota-tion of crops and crops > the rotation between vegetable and crops>the greensward only>the rotation between vegetable and vegetable>the fruit tree only; (2) Content of soil available potassium after harvest gradually increased with the depths of soil profile in the farmlands of different fields and different rotation fields. The more soil available potassium contents were, the more potassium nutrient surplus had been in different planting patterns fields; (3) Potassium nutrient surpluses of the farmland soil in different crops fields and different planting patterns were positive correlated with the content of available K content in the surface soil (0~30 cm) in harvesting, but not significantly.关键词
轮作/农田/钾养分表观平衡/速效钾Key words
cropping rotation/farmlands/potassium nutrient balance/available K分类
农业科技引用本文复制引用
许仙菊,赵坚,张维理,张永春,姚政..不同轮作模式农田钾养分表观平衡及其对土壤速效钾含量的影响[J].土壤,2016,(3):37-42,6.基金项目
江苏省农业科技自主创新引导资金项目[CX (15)1004]；公益性行业(农业)科研专项(201003014－1－2；201203013－01－01)；上海市科学技术委员会科研计划项目(14395810602)。 （15）
