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在西南农业大学国家紫色土肥力与肥料效益监测基地上 ,研究多年定位施钾对紫色土水稻、小麦产量品质的影响。研究结果如下 :定位试验初期 (1992年 ) ,钾肥对小麦无增产效果 ,每千克K2 O仅增产水稻 5 9kg ;8年定位试验后的 1999年 ,每千克K2 O增产小麦 9 4kg ,增产水稻 14 8kg ;这表明经过 8年定位试验 ,钾素已成为紫色土水稻、小麦进一步提高产量的重要因素。同时 ,钾肥还能明显改善稻、麦品质。
Based on the National Purple Soil Fertility and Fertilizer Benefit Monitoring Base of Southwest Agricultural University, the effects of years of applied potassium on yield and quality of purple soil paddy and wheat were studied. The results are as follows: In the early stage of positioning test (1992), potassium fertilizer did not increase the yield of wheat, yielding only 59 kg of K 2 O per kg; after 8 years of location test, 8kg; This shows that after 8 years of positioning test, potassium has become purple soil rice, wheat further increase yield an important factor. At the same time, potash can also significantly improve the quality of rice and wheat.