摘要
山西省西部黄土丘陵、中部盆地和东部丘陵土壤缓效钾含量由北向南逐渐增加.其释放过程符合幂回归(y=ax^(-b)).其释放容量是:保德红土>午城黄土>黑垆土、(土娄)土(褐土)>绵沙土,但释放强度则相反.土壤缓效钾释放累积量与不同土壤类型缓效钾释放容量一样,是从北向南逐渐增加的.
The potentiality of soil potassium supply in Shanxi province is studied in the present paper. The results obtained are summarized as follows.The distribution of slow-acting potassium in Shanxi Province is. the content of slow-acting potassium grad ually increases from north to south on loess hills of the west part, in the basin of the middle part and on hills of the east part in Shanxi province.The process of slow-acting potassium release is in agreement with the power regression (Y=Ax-b) . The capacity of the slow-acting potassium release is. Baode red soil>Wucheng loess>heilu soil, Lou soil (drab soil) >Sand cultivated loessal soil, but the intensity of the slow-acting potassium release is the opposite. The accumulation of slow-acting potassium release gradually increases from north to south just as the capacity of slow acting potassium release of different soil types.
出处
《华北农学报》
CSCD
北大核心
1989年第3期81-86,共6页
Acta Agriculturae Boreali-Sinica
关键词
缓效钾
供钾潜力
土壤
Slow-acting potassium of soil
Potentiality of soil potassium supply
