土壤速效钾养分平衡研究张明普，蒋仁成，张洪源，厉志华（江苏徐淮地区徐州农科所２２１１２１）随着农业生产复种指数的增加、单产的提高，钾肥的施用已日益为人们所重视。土壤中的钾较为丰富，一般全钾含量在２％左右，主要问题是有效性低，因此土壤中速效性钾含量的高... Study on the Nutrient Balance of Available Potassium in Soil Zhang Mingpu, Jiang Rencheng, Zhang Hongyuan, Li Zhihua (Xuzhou Agricultural Science Institute, Xuhuai, Jiangsu 221121) With the increase of cropping multiplication index of agricultural production, the improvement of yield per unit area, the application of potash fertilizer has been paid more and more attention by people. Potassium in the soil is more abundant, generally about 2% total potassium, the main problem is the low efficiency, so the soil available potassium ...