氮、鉀及氮鉀互作對不同甘薯產量品質和養(yǎng)分吸收的影響
[Abstract]:Nitrogen and potassium interaction could affect nutrient uptake, utilization and yield of sweet potato. Using different sweet potato varieties (Shangshu 19, Yanshu 25, Xushu 32 and Longshu 9) as experimental materials, field experiments were conducted in 2015 and 2016 in Shanyang North Village, Daiyue District, Tai'an City, Shandong Province. The results showed as follows: 1. Different varieties of sweet potato had different optimal economic nitrogen application rates. Under the experimental conditions, by regression analysis, the optimum economic nitrogen application rate of Shangshu 19 was 73.71 kg/hm~2, Xusu 32 and the best economic nitrogen application rate was 74.46 kg/hm~2, Yanshu 25. The optimum economic nitrogen application rate was 79.94 kg/hm~2.2. the optimum economic nitrogen application rate of Shangshu 19 was 73.71 kg/hm~2, and that of Yanshu No. 25 was 74.46 kg/hm~2,. Different varieties of sweet potato had different optimal economic potassium application rate. Under the experimental conditions, by regression analysis, the optimum economic potassium application rate of Shangshu 19 is 90.16 kg/hm~2, Xusu 32 and the best economic potassium application amount is 92.98 kg/hm~2, Yanshu 25. The optimum economic potassium application rate is 99.43 kg/hm~2.3.. The optimum ratio of nitrogen and potassium in different sweet potato varieties is different. Under the experimental conditions, by regression analysis, the best economic ratio of nitrogen and potassium of Shangshu 19 is N 74.73 kg/hm~2,K2O 105.97 kg/hm~2, long Shu 9. The best economic ratio of nitrogen and potassium is N 65.07 kg/hm~2,K2O 86.72 kg/hm~2,. The optimum ratio of N and K for Yanshu 25 is N65.12 kg/hm~2,K2O 92.13 kg/hm~2.4.. The interaction of nitrogen and potassium could increase the number of sweet potato, increase the weight of single potato, increase the yield of sweet potato and increase the dry matter quality of sweet potato root. The accumulation of dry matter in root of Yanshu 25 was significantly higher than that of the other two varieties. The ratio of T / R of different sweet potato was decreased by interaction of nitrogen and potassium, and there were differences among different varieties. The ratio of T / R of Yanshu 25 was higher than that of other two varieties. Nitrogen and potassium interaction increased the accumulation of nitrogen, phosphorus and potassium in different sweet potato tubers. The N and K uptake of Shangshu 19 was significantly higher than that of the other two varieties, and the phosphorus uptake of Longshu 9 was significantly lower than that of the other two varieties. The interaction of nitrogen and potassium had a significant effect on root quality of different sweet potato varieties, and the content of starch and protein of Shangshu 19 was significantly higher than that of the other two varieties, and the soluble sugar content of Yanshu 25 was the highest.
【學位授予單位】:山東農業(yè)大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:S531
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