摘要
采集湖南农学院土壤教研室的不同稻作制、绿肥施用量和地下水位三因子多水平长期定位试验的土壤,对其不同形态钾的剖面分布、耕层土壤速效钾的动态变化以及酸提取钾总量进行了研究。
A long-term fixed-location experiment with the combination of threerice-based cropping system, three manuring rates and two groundwater levels hasbeen designed, and performed to examine the effects of the rice-based croppingsystems, manuring rates and groundwater levels on the profile distributions ofdifferent soil K fractions, kinetics of soil steadily-available K and acid-extractableK contents of plough layer.
关键词
水稻土
耕作制度
绿肥
水位
钾素
paddy soil
farming system
green manure
ground water level
soil potassium
