热带作物学报2022，Vol.43Issue(7)：1450-1458,9.DOI:10.3969/j.issn.1000-2561.2022.07.016
不同氮素形态配比对菜用甘薯产量和品质的影响
Effects of Different Forms and Ratios of Nitrogen on Yield and Qua-lity of Leaf-vegetable Sweet Potato Stem Tips
摘要
Abstract
This study was conducted to solve the problems of low yield, poor quality, and ecological environment dete-rioration caused by unreasonable fertilization in the planting process of leaf-vegetable sweet potato. As the main part of agricultural fertilizer input, nitrogen fertilizer is an important factor affecting the yield and quality of leaf-vegetable sweet potato. The response mechanism of yield and quality of leaf-vegetable sweet potato to nitrogen form ratio was revealed by setting different nitrogen form ratio treatments and according to the changes of related indexes of yield and quality of leaf-vegetable sweet potato stem tip. It provides a theoretical basis for reasonable fertilization to improve the yield and quality of leaf-vegetable sweet potato and reduce environmental pollution caused by unreasonable fertilization. This study was a field experiment. Two main leaf-vegetable sweet potato varieties, 'Fushu 18' and 'Eshu 10', were used. A field experiment with the two-factor split-plot experiment design with five treatments was conducted: (1) NH4+-N:NO3–-N:CONH2-N = 1:1:1 (N1); (2) NH4+-N:NO3–-N:CONH2-N = 1:0 :2 (N2); (3) NH4+-N:NO3–-N:CONH2-N = 2:0 :1 (N3); (4) NH4+-N:NO3–-N:CONH2-N = 1:2 :0 (N4); (5) NH4+-N:NO3–-N:CONH2-N = 2:1:0 (N5). The results showed that N4 and N5 treatments significantly increased shoot tip yield, total phenol content, total flavonoids content, soluble sugar content, PAL activity and IbPAL gene expression of leaf-vegetable sweet potato. There were significant differences between different treatments in the same period. With the continuous progress of the growth period, the changes of various indicators showed a trend of increasing first and then decreasing. Among them, the effect of N4 treatment was more significant. Except the soluble sugar content was the lowest under N3 treatment, the other indicators were the lowest under N2 treatment. The correlation analysis confirmed that total phenols, total flavon-oids, soluble content and PAL enzyme activity were positively correlated with IbPAL gene expression, while the soluble sugar content was negatively correlated with gene expression, indicating that the change of soluble sugar content was not correlated with IbPAL gene expression. It can be seen from the treatment of nitrogen morphology ratio that N4 and N5 treatments provided more NO3--N for plants than N2 and N3 treatments, suggesting that NO3--N played a more im-portant role in promoting the growth and development of leaf-vegetable sweet potato, but the effect of CONH2-N on yield and quality of sweet potato was not prominent in this experiment. N4 treatment (NH4+-N:NO3--N:CONH2-N = 1:2:0) was the best combination to promote the yield and quality of leaf-vegetable sweet potato. The results of this study could provide a theoretical basis for reasonable fertilization to obtain ideal crop yield and quality, and provide reference for related research on other crops.关键词
菜用甘薯/氮素形态配比/总酚/总黄酮/可溶性糖/苯丙氨酸解氨酶Key words
Ipomoea batatas (L.) Lam./nitrogen form ratio/total polyphenols/total flavonoids/soluble sugar/phenyla-lanine ammonia-lyase分类
农业科技引用本文复制引用
李成阳,张文英,柴沙沙,刘意,Soviguidi Deka Reine Judesse,王连军,雷剑,程贤亮,杨园园,杨新笋..不同氮素形态配比对菜用甘薯产量和品质的影响[J].热带作物学报,2022,43(7):1450-1458,9.基金项目
国家重点研发计划项目(No.2019YFD1001300,No.2019YFD1001304) （No.2019YFD1001300,No.2019YFD1001304）
财政部和农业农村部国家现代农业产业技术体系项目. （）
