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在不同的供钾地块上,通过田间试验研究不同作物的需钾水平。结果表明,在土壤速效钾为70 mg/kg的地块上,施用钾素化肥有一定的增产效果,土壤含钾量越低,施钾的增产效果越明显,在玉米、小麦等禾本科作物上增产尤为明显。试验土壤上,每667m2施用有机肥3000kg并施钾素6.23kg,可以补偿土壤中钾的亏损,达到钾素平衡。
Potassium levels in different crops were determined by field experiments on different K-supply plots. The results showed that the application of potassium fertilizers had some effects on the yield of 70 mg / kg of available potassium in soil. The lower the content of potassium in soil, the more obvious the increase of yield was. In grasses such as corn and wheat Increased production is particularly evident. On the test soil, applying 3000kg of organic fertilizer per 667m2 and applying 6.23kg of potassium could compensate for the loss of potassium in soil and achieve the balance of potassium.