Effects of different formula fertilization on physicochemical properties and yield of lotus root soil and surface water
In view of the potential non-point source pollution of lotus pond fertilizer,the screening of green and efficient lotus root functional fertilizer and fertilizer quota system were studied.The results showed that the soil pH value,organic carbon and total nitrogen content of the soil were significantly increased when the total nutrient was kept at 795 kg·hm-2 and carbon-based fertilizer was applied,but the total phosphorus and total potassium were not significantly increased.In addition to total phosphorus,the physicochemical indexes of surface water decreased significantly with the extension of growth cycle,and the values of physicochemical indexes were the highest at seedling stage.In the treatment of replacing conventional fertilization with 20%carbon-based organic fertilizer,the number of roots,total output of lotus root and weight of single root were significantly increased by 20.2%,31.2%and 9.16%,respectively.In general,the maximum fertilization limit of lotus root is set as 795 kg·hm-2 of total nitrogen,phosphorus and potassium and 375 kg·hm-2 of pure nitrogen,which is scientific,reasonable and feasible,and can fully meet the needs of green and efficient production of lotus root.
万方数据
维普
