摘要
研究稻草不同覆盖厚度对甘薯产量和氮代谢的影响,并探讨甘薯产量、叶片氮含量与代谢相关酶活性之间的相关性,旨在筛选出适合甘薯栽培的最佳覆盖方式,为甘薯高产栽培提供理论依据。结果表明:(1)各覆盖处理的产量高低顺序为:"草2+土">"草4+土">"草">对照;(2)相关性分析表明,各处理的甘薯产量与叶片全氮含量呈显著正相关,与硝酸还原酶(NR)活性呈极显著正相关;叶片全氮含量与可溶性蛋白含量、NR、谷氨酰胺合成酶(GS)、谷氨酸脱氢酶(GDH)活性均呈极显著正相关。综合各项指标认为,"草2+土"可用作甘薯栽培上适宜的覆盖方式,氮代谢相关指标可作为判断甘薯长势与产量高低的理论参考。
In order to choose the best mulching method and provide a theoretical basis of high-yield cultivation, the effects of different thickness of straw covering on the yield and nitrogen metabolism in sweet potatoes were investigationed, and the relationships among the yield, the nitrogen contents, and the activities of the nitrogen metabolism related enzymes were probed. The yield of all the mulching treatments ranked as straw-2 ＋ soil〉 straw-4 ＋soil〉straw〉contro. The correlation analysis showed that the yield had significant positive correlations with the contents of the total nitrogen of leaves, as well, all the contents of the total nitrogen of leaves had extremely significant positive correlations with the contents of the soluble protein, the activity of nitrate rednctase（NR）, glutamine synthase（GS） and glutamate dehydrogenase（GDH）. According to the above comprehensive indicators, it was considered that the nitrogen metabolism related indicators could be used as one of the theoretical characteristics in judging the growth and the yield of sweet potatoes.
作者
鄢铮
YAN Zheng(Fuzhou Institute of Agricultural Sciences, Fuzhou, Fujian 3.50018, China)
出处
《热带作物学报》
CSCD
北大核心
2018年第3期433-437,共5页
Chinese Journal of Tropical Crops
基金
福建省科技计划星火项目(No.2016S0003)
福州市科技计划项目(No.2016-N-114)
关键词
甘薯
覆盖
稻草
氮代谢
产量
sweet potato
covering
straw
nitrogen metabolism
yield
