大麦与谷类科学2025，Vol.42Issue(4)：10-15,6.DOI:10.14069/j.cnki.32-1769/s.2025.04.002
聚丙烯酰胺施用量对黑青稞光合特性和产量的影响
Effect of Polyacrylamide Application Rate on Photosynthetic Characteristics and Yield of Black Highland Barley
摘要
Abstract
To investigate the effects of polyacrylamide application on photosynthetic characteristics and biomass of black highland barley and provide a theoretical basis for the rational application of polyacrylamide in high-yield and stable-yield cultivation of highland barley,a single-factor randomized block design was employed.Using Longzi highland barley as the experimental material,five treatments with different polyacrylamide application rates were established:P0(0 kg/hm2,control),P1(6 kg/hm2),P2(12 kg/hm2),P3(18 kg/hm2),and P4(24 kg/hm2).The study compared the trends in photosynthetic characteristics,biomass,yield,and yield components of flag leaves under different polyacrylamide treatments.The results showed that:(1)Polyacrylamide application significantly enhanced the photosynthetic performance of flag leaves post-anthesis(P＜0.05),with the P2 treatment showing the most pronounced effect.The SPAD value,stomatal conductance,and transpiration rate of flag leaves peaked at 14 days post-anthesis,and P2 increased these parameters by 17.52%,27.95%,and 18.39%,respectively,compared to P0.The intercellular CO2 concentration peaked at 35 days post-anthesis,and P2 showing a 22.91%increase over P0.The net photosynthetic rate peaked at 7 days post-anthesis,with P2 demonstrating a 32.04%increase over P0.(2)Polyacrylamide application increased the biomass and root-shoot ratio of black highland barley.Compared to P0,the biomass under P1,P2,P3 and P4 treatments increased by 31.58%,64.10%,48.19%and 13.86%,respectively,while the root-shoot ratio increased by 2.60%,6.49%,5.19%and 1.30%,respectively.(3)Polyacrylamide application enhanced the yield of black highland barley.Among all the treatments,the yield of black barley under P2 treatment was the highest,reaching 6 588.08 kg/hm2.Therefore,an application rate of 12 kg/hm2 of polyacrylamide effectively improves the photosynthetic characteristics,biomass and yield of highland barley.关键词
聚丙烯酰胺/黑青稞/光合特性/生物量/产量Key words
Polyacrylamid/Black highland barley/Photosynthetic characteristics/Biomass/Yield分类
农业科技引用本文复制引用
黄慧云,漆文静,付甜甜,冯西博..聚丙烯酰胺施用量对黑青稞光合特性和产量的影响[J].大麦与谷类科学,2025,42(4):10-15,6.基金项目
国家自然科学基金(32060482) （32060482）
高原作物学创新团队建设项目(xznmxyrcdwjs-2024-11) （xznmxyrcdwjs-2024-11）
西藏特色农牧资源研发省部共建协同创新中心—青稞方向(编号:XZTSZY202001). （编号:XZTSZY202001）
