Effect of Planting Density on Photosynthetic Indexes and Yield Quality of Astragalus membranaceus Under Intermembrane Cultivation Conditions
In this study,Mongolian Astragalus seedlings were planted in a randomized group experimental design with a fixed row spacing of 30 cm under the interfilm cultivation technique:158 731 plants/hm2 for DM,185 278 plants/hm2 for ZM and 266 800 plants/hm2 for GM.The root index,photosynthetic index,yield and quality of Mongolian Astragalus were analyzed using the gray correlation method and correlation.The results showed that planting density had a significant positive correlation(P<0.05)with root length,root fresh weight and root dry weight,but no correlation with lateral root number.Planting density had a highly significant positive correlation(P<0.01)with chlorophyll content and transpiration rate,and a significant positive correlation(P<0.05)with net photosynthetic rate,stomatal conductance and intercellular CO2 concentration of Astragalus.Planting density had a highly significant negative correlation(P<0.01)with rood number,but had positive cor-relation with yield(P<0.01).At ZM density,both Astragalus methyloside and mullein isoflavone glucoside contents were the highest,showing the the best economic efficiency.The equal-weighted correlation and weighted correlation results for different planting densities were ZM>GM>DM.In conclusion,ZM planting density un-der interfilm cultivation conditions significantly improves photosynthetic index and yield quality components of Astragalus.
NETL
NSTL
万方数据
