摘要
本文应用化学分析和田间试验方法 ,系统研究了风沙土钾素资源特征及酿酒葡萄对钾素的吸收利用。结果表明 :风沙土钾素含量较低 ,土壤速效钾含量及被土壤固定的施入钾量均随着施钾量的提高而增加 ,而且风沙土土壤缓效钾易于释放 ,能及时补充速效钾的亏缺 ,但也反映了缓效钾易于耗竭 ,土壤供钾缓冲能力较低。不同施钾处理中 ,植株和子粒含钾量均随施钾量的提高而提高 ,钾肥利用效率顺序为 :沙土 >轻沙土 >紧沙土。高肥力土壤基础供钾能力强 ,钾肥利用率较高 ,而低肥力土壤则相反 ,钾肥利用率差。钾素对于植株鲜重、根长、根数、百粒重、结果枝率等均有明显的影响 ,且可使酿酒葡萄含糖量、酒精和出汁率增加 。
In the paper, the authors applied the means of chemistry analysis and field-experiment to study on validity of potassium and its effect to growth of wine-grapes. The result showed that the content of relaxed potash and valid potash is low. The valid-potassium and solw-potassium with increasing of applied-potassium. And solw-potassium release easily, which can replenish lack of valid-potassium. But slow-potassium is exhausted easily, the buffering capacity of supplying potassium is low. The content of potassium of grains and plants increase togather with increasing of applied potassium in different treatment. The sequence of potassium of high-fertility is better than that of low-fertility, and rate of potassium utilzation is high. Potash can affect weight of plant, weight of root, number of root, number of root, weight of hundred grains, percentage of bearing branch, and increase the content of sugar and wine, and decrease acid degree.
出处
《宁夏农学院学报》
2000年第2期1-6,共6页
Journal of Ningxia Agricultural College
