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洞庭湖地区是全国重点的商品粮基地之一,常年提供的商品粮占全省的三分之一左右。因此,对本地区的生产现况及增产潜力,势必引起有关管理、生产部门及科研单位的重视。近年来,由于化学氮肥用量的增加,钾肥的施用效果问题,已引起人们的高度关切。为此,我们进行了湖区土壤供钾能力的研究。土壤耗钾栽培试验的目的在于配合各田间试验,在较严格的条件下,探讨湖区各类土壤钾素的貯备量及共供应强度,为钾肥的合理分配与施用,提供可靠的科学依据。
The Dongting Lake area is one of the key commodity grain bases in the country. The commodity grain provided by perennials accounts for about one third of the province. Therefore, the status of production in the region and the potential for increasing production are bound to attract the attention of the relevant management, production departments and research institutes. In recent years, due to the increase of the amount of chemical nitrogen fertilizer, the application effect of potassium fertilizer has aroused great concern. To this end, we conducted a study of potassium availability in the lake. The purpose of soil potassium consumption cultivation experiment is to cooperate with the field experiments to investigate the reserves and total supply intensity of potassium in various soil types under the stricter conditions in order to provide a reliable scientific basis for the rational distribution and application of potash fertilizer.