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采用田间试验法,探讨了容城县冬小麦高、中、低产田土壤速效磷钾的供肥能力。结果表明:高、中、低产田土壤磷素贡献率分别为82.37%、90.36%和84.82%,土壤钾素贡献率分别为88.68%、85.89%和87.05%;土壤的供磷能力分别为67.64 kg/hm2、63.75 kg/hm2和57.11 kg/hm2,土壤的供钾能力分别为145.64 kg/hm2、121.19 kg/hm2和117.22 kg/hm2。表明该区土壤中的磷钾不是限制冬小麦产量的主要因素。
Field experiment was conducted to study the availability of available P and K fertilizers in high, medium and low yielding fields of winter wheat in Rongcheng County. The results showed that the contribution rate of soil phosphorus was 82.37%, 90.36% and 84.82%, and the contribution rate of soil potassium was 88.68%, 85.89% and 87.05% respectively. The phosphorus supply capacity of soil was 67.64 kg / hm2, 63.75 kg / hm2 and 57.11 kg / hm2, respectively. The potassium supplying capacity of soil was 145.64 kg / hm2, 121.19 kg / hm2 and 117.22 kg / hm2, respectively. This indicates that the phosphorus and potassium in the soil in the area are not the main factors limiting the winter wheat yield.