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应用N-P-Zn三因素五水平回归设计,研究钙质紫色土肥料优化配方与稻麦产量品质的关系。结果表明,水稻每公顷施N150～195公斤,P_2O_5 90～120公斤、ZnSO_4·7H_2O15～22.5公斤,可产稻谷8265～8490公斤;稻米蛋白质含量9.6～10.6%,淀粉含量74.9～76.5%。小麦施N120～165公斤、P_2O_5 75～105公斤,ZnSO_4·7H_2O0～15公斤,可产小麦3300～3720公斤;蛋白质含量11.4～12.6%,淀粉含量61.8～64.5%。应用表明,90%以上达到增产效果。钙质紫色土约有半数缺锌,在稻麦轮作中,可每隔2～3年在水稻上施锌一次,小麦则利用其后效,不施锌肥。
The application of N-P-Zn three-factor five-level regression design to study the relationship between the optimum formula of calcareous purple soil fertilizers and the yield and quality of rice and wheat. The results showed that rice per hectare applied N150 ~ 195kg, P_2O_5 90 ~ 120kg, ZnSO_4 · 7H_2O15 ~ 22.5kg, rice produced 8265 ~ 8490kg; rice protein content 9.6 ~ 10.6% and starch content 74.9 ~ 76.5%. N120 ~ 165 kg of wheat, 75 ~ 105 kg of P_2O_5, and 0 ~ 15 kg of ZnSO_4 · 7H_2O, which can produce 3300 ~ 3720 kg of wheat; the protein content is 11.4-12.6% and the starch content is 61.8-64.5%. Application shows that more than 90% to increase production. About half of calcium purple soil zinc deficiency, rice and wheat rotation, every 2 to 3 years on the rice on the zinc, wheat is the use of its after-effects, no zinc fertilizer.