木薯‖紫花苜蓿对木薯生理特性、产量及农田土壤理化性质的影响OA

This study aimed to investigate the intercropping advantages of the cassava-alfalfa system and iden-tify the optimal planting configuration.Four planting patterns were established,including monoculture cassava(MC),intercropping of four rows of cassava with six rows of alfalfa at a spacing of 50 cm(ICA45),intercropping of four rows of cassava with six rows of alfalfa at a spacing of 80 cm(ICA48),and intercropping of two rows of cas-sava with six rows of alfalfa at a spacing of 50 cm(ICA25).Subsequently,the effects of different patterns on cassa-va yield,agronomic traits,physiological characteristics,and soil properties were measured and analyzed.The re-sults showed that the intercropping of cassava and alfalfa exhibited different degrees of advantages.Specifically,compared with MC,the ICA25 pattern significantly increased chlorophyll a and total chlorophyll content in cassava leaves by 26.16％and 23.40％,respectively.Moreover,it also significantly increased total surface area,total vol-ume,and average diameter of storage roots by 132.83％,268.75％,and 90.74％,respectively.In addition,soil a-vailable potassium content was significantly increased by 10.69％to 18.31％,and fresh tuber mass per plant was significantly increased by 31.92％.Correlation analysis showed that there were significant positive correlations among soil nutrient content,aboveground vegetative growth,and tuber yield traits,indicating that soil nutrients en-hance crop yield by promoting aboveground growth.In conclusion,the intercropping pattern of two rows of cassava with six rows of alfalfa at a spacing of 50 cm demonstrated significant intercropping advantages in improving cassava agronomic traits,increasing fresh tuber yield,and optimizing soil physicochemical properties,which could be used as the optimal pattern for this intercropping system.