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土壤缺钾现状 七十年代以来,随着我国农作物高产栽培技术的兴起,一些高产品种迅速普及,农田复种指数不断增加,农民向土地中大量投入氮肥和磷肥,而很少补充钾,使土壤中的氮、磷、钾养份平衡失调,缺钾土地不断扩大。全国耕地土壤的速效钾含量每年以2ppm的速度持续下降,南方各地土壤缺钾情况更为重复。目前全国缺钾耕地面积已达60％。因此,土壤钾素不足已成为限制我国农作物产量提高、品质改善的重要因素。然而,我国又是一个钾矿资源匮乏的国家,全国每年20万吨化学钾肥的生产能力,还不够河北省一年的需求量,每年
Since the 1970s, with the rise of crop cultivation techniques in China, the rapid popularization of some high-yielding varieties and the increase of crop multiplication index have led farmers to invest a large amount of nitrogen and phosphate fertilizers into the land while seldom replenishing potassium, The balance of nitrogen, phosphorus and potassium nutrients is unbalanced, and the land deficit of potassium is constantly expanding. The available potassium content of arable land in the country continues to decrease at a rate of 2ppm per year, and the situation of potassium deficiency in the soil in the south is more repeated. At present, the area of potassium-deficient arable land has reached 60%. Therefore, insufficient potassium in soil has become an important factor that limits the improvement of crop yield and quality in China. However, our country is also a country lacking in potash resources. The annual production capacity of 200,000 tons of chemical potash fertilizer in the whole country is not enough for one year in Hebei Province. Each year,