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本试验于1987～1989年在寻甸县北亚热带地区的草甸型水稻土上进行,得到下列结果:水稻土缺乏有效氮和有效磷,具有足够的有效钾和有机质,测定了施肥公式中的主要参数:定产公式中的参数,稻谷(含稻草)吸收的养分数量,化肥利用率,肥料的养分含量以及土壤有机质的当季矿化率,把这些参数的测定值代入公式,即可得到在水稻集约栽培条件下,每亩主要肥料的推荐施肥量是:尿素12～17kg(含N6～8kg),普钙24～33kg(含P_2O_54～6kg),硫酸钾0kg,厩肥0.8T。
The experiment was carried out on meadow-type paddy soil in the north subtropical region of Xundian County from 1987 to 1989. The results are as follows: The paddy soil lacks available and available phosphorus and has enough available potassium and organic matter. The main parameters: the formula in the formula, the amount of nutrients absorbed by rice (including rice straw), fertilizer use, fertilizer nutrient content and seasonal mineralization of soil organic matter, the measured values of these parameters into the formula, you can get Under intensive cultivation of rice, the recommended fertilizer amount per mu of main fertilizer is: urea 12 ~ 17kg (including N6 ~ 8kg), general calcium 24 ~ 33kg (containing P2O5 ~ 6kg), potassium sulfate 0kg, manure 0.8T.