摘要
用温室盆栽耗竭试验方法和室内模拟田间条件，对河南５类８种土壤供钾能力和固钾特性进行了研究。结果表明，砂姜黑土土壤钾素耗竭程度严重，表现是植株吸钾总量和首茬作物吸钾量最低。砂姜黑土、红粘土和粘质潮土对外源供给钾素的固钾率明显高于其他土类。褐土与黄褐土的固钾能力相似，砂质潮土最低。
Potassium(K)supplying power and K fixation characteristics of 8 representative plow layer soils were studied by laboratory analysis,pot culture experiment and K fixation trials.The results showed that:(1)K supplying power of Shajiang black soil was the lowest among 3 soils based on the lowest total net amount of K uptake.(2)K fixation power by soil was negatively correlated with total net amount of K uptake.There was the high amount of K fixation in Shajiang black soil,Hongnian soil,and clayed fluvo aquic soil,and low in sandy fluvo aquic soil.
出处
《华北农学报》
CSCD
北大核心
1999年第1期123-128,共6页
Acta Agriculturae Boreali-Sinica
关键词
供钾能力
固钾特性
土类
河南省
Potassium
Fixation
K supplying power
Soil
Henan province
