山西农业大学学报（自然科学版）2024，Vol.44Issue(3)：37-48,12.DOI:10.13842/j.cnki.issn1671-8151.202312002
PAC配施氮肥对高粱花后叶片抗氧化特性及产量的调控效应
Regulatory effects of PAC combined with nitrogen fertilizer on leaf antioxidant characteristics and yield of sorghum after anthesis
摘要
Abstract
[Objective]In the northeastern region of China,the full basal application of fertilizers often leads to imbalanced nutri-ent supplies during the growth period of sorghum,resulting in nitrogen deficiency and premature senescence in the later growth stages.This study aimed to explore the regulatory effects of polyaspartic acid-chitosan(PAC)on leaf senescence and yield of sorghum during the flowering to grain-filling stage under the background of full basal application of fertilizers,therefore assist-ing in the establishment of an anti-aging and yield-increasing technologies for sorghum under full basal application of fertilizers.[Methods]Field experiments were conducted at the Gongzhuling Experimental Station of Chinese Academy of Agricultural Sci-ences(43°29′55″N,124°48′43″E)from 2020 and 2021,Two varieties,Longza 25 and Jiza 127,were selected as experimental materials.Different nitrogen fertilizer treatments and chemical control treatment(PAC)were setup,and the degree of leaf se-nescence,antioxidant characteristics,and yield differences of sorghum under PAC combined with nitrogen fertilizer were mea-sured and analyzed.[Results]From flowering to maturity,increasing nitrogen levels significantly increased the leaf area(LA)per plant of the two sorghum varieties,increased the relative content of chlorophyll in flag leaves,enhanced the activity of anti-oxidant enzymes,and decreased malondialdehyde(MDA)content,with differences observed between the two varieties.PAC treatment significantly increased the activity of superoxide dismutase(SOD),catalase(CAT),and peroxidase(POD),as well as the relative content of chlorophyll in flag leaves of both sorghum varieties at various nitrogen levels.It significantly in-hibited the decrease in leaf area per plant and delayed the aging process of plants.After PAC treatment,both varieties showed average yield increase of 2.26％～9.11％for Longza 25 and 3.51％～15.76％for Jiza127 compared to their respective conven-tional nitrogen treatments.Both varieties showed significant yield increases at a nitrogen application rate at 150 kg·hm-2,with average increases of 9.11％and 15.76％over two years.[Conclusion]The combined application of PAC and nitrogen fertilizer under full basal application can be used as a cultivation technology to effectively prevent aging and increase yield in the central and western sorghum-producing area of Jilin Province,China.关键词
聚天门冬氨酸和脱乙酰甲壳素复配剂/全基施/高粱/抗氧化特性/产量Key words
Polyaspartic acid-chitosan/One-time basic fertilizer application/Sorghum/Lantioxidant characteristics/Yield分类
农业科技引用本文复制引用
张薇,闫鹏,王琦,许艳丽,李桂英,陈迪苏,焦晓燕,卢霖,董志强..PAC配施氮肥对高粱花后叶片抗氧化特性及产量的调控效应[J].山西农业大学学报（自然科学版）,2024,44(3):37-48,12.基金项目
国家重点研发计划(2019YFD1001703) （2019YFD1001703）
