Dry Matter Accumulation and Transport Characteristics of Different Soybean Cultivars under Maize-Soybean Intercropping
Four shade-tolerant and high-yield soybean cultivars were used as materials,and the soybean cultivar"Zhonghuang13"was used as a control.This study investigated dry matter accumulation and transport characteristics in different soybean cultivars under maize-soybean intercropping.The accumulation and trans-port of dry matter were analyzed in various above-ground organs(main stem leaves,branched leaves,main stems,branched stems,pods,and seeds)from flowering to maturity.The findings indicate that dry matter accu-mulation in the above-ground parts and seeds of soybeans follows an"S"growth pattern("slow-fast-slow")from 7 to 57 days after flowering.The key period for soybean yield formation is 27～37 days after flowering.The distribution of plant dry matter in various organs changes with the growth center transition.Main stem leaves serve as the main"source"for enriching the seed"sink"and significantly contribute to seed yield.Compared with CK(Zhonghuang13),SL-3(Shandou125)and SL-4(Shanning17)exhibited higher dry matter accu-mulation and transport capacity,with robust sources and large sinks.Comprehensive analysis suggests that in maize-soybean intercropping,selecting cultivars with a strong"source"and a large"sink,"focusing on field management during the flowering and pod stages,strengthening the source,increasing the sink,and enhancing flow are crucial for improving soybean yield.
Maize-soybean intercroppingSoybean cultivarsAccumulation of dry matterTransport
NETL
NSTL
万方数据
