【摘要】：氮鉀互作能夠影響甘薯養(yǎng)分吸收、利用和產(chǎn)量,為研究不同甘薯品種最適氮鉀配比特進(jìn)行此研究。以不同甘薯品種(商薯19號(hào)、煙薯25號(hào)、徐薯32號(hào)與龍薯9號(hào))為試驗(yàn)材料,于2015年與2016年在山東省泰安市岱岳區(qū)山陽(yáng)北村進(jìn)行大田試驗(yàn),研究結(jié)果表明:1.不同品種甘薯最佳經(jīng)濟(jì)施氮量有所不同。在本試驗(yàn)條件下,經(jīng)回歸分析得出商薯19號(hào)的最佳經(jīng)濟(jì)施氮量為73.71 kg/hm~2,徐薯32號(hào)的最佳經(jīng)濟(jì)施氮量為74.46 kg/hm~2,煙薯25號(hào)的最佳經(jīng)濟(jì)施氮量為79.94 kg/hm~2。2.不同品種甘薯最佳經(jīng)濟(jì)施鉀量有所不同。在本試驗(yàn)條件下,經(jīng)回歸分析得出商薯19號(hào)的最佳經(jīng)濟(jì)施鉀量為90.16 kg/hm~2,徐薯32號(hào)的最佳經(jīng)濟(jì)施鉀量為92.98 kg/hm~2,煙薯25號(hào)的最佳經(jīng)濟(jì)施鉀量為99.43 kg/hm~2。3.不同品種甘薯最佳經(jīng)濟(jì)氮鉀配比有所不同。在本試驗(yàn)條件下,經(jīng)回歸分析得出商薯19號(hào)的最佳經(jīng)濟(jì)氮鉀配比為N 74.73 kg/hm~2、K2O 105.97 kg/hm~2,龍薯9號(hào)的最佳經(jīng)濟(jì)氮鉀配比為N 65.07 kg/hm~2、K2O 86.72 kg/hm~2,煙薯25號(hào)的最佳經(jīng)濟(jì)氮鉀配比為N65.12 kg/hm~2、K2O 92.13 kg/hm~2。4.氮鉀互作可以增加不同甘薯結(jié)薯數(shù)、提高單薯重,從而提高甘薯的產(chǎn)量,增加甘薯塊根干物質(zhì)量;不同品種之間存在差異,煙薯25號(hào)塊根干物質(zhì)積累量相對(duì)其它兩品種有明顯提高。5.氮鉀互作可以降低不同甘薯T/R比值;不同品種之間存在差異,煙薯25號(hào)相對(duì)其它兩品種T/R比值較高,易產(chǎn)生莖葉瘋長(zhǎng)現(xiàn)象。6.氮鉀互作對(duì)不同甘薯塊根氮素、磷素、鉀素的積累量都有所提升;不同品種甘薯營(yíng)養(yǎng)元素吸收量有所差異,商薯19號(hào)的氮、鉀吸收量明顯高于其它兩品種,龍薯9號(hào)的磷吸收量明顯低于其它兩品種。7.氮鉀互作對(duì)不同甘薯塊根品質(zhì)有顯著影響,且不同品種甘薯品質(zhì)存在差異;商薯19號(hào)淀粉與蛋白質(zhì)含量明顯高于其它兩品種,煙薯25號(hào)則是可溶性糖含量相對(duì)最高。
[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(xué)位授予單位】：山東農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：S531

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