Boosting proso millet yield by altering canopy light distribution in proso millet/mung bean intercropping systems

Publication date: Available online 10 December 2019Source: The Crop JournalAuthor(s): Xiangwei Gong, Uzizerimana Ferdinand, Ke Dang, Jing Li, Guanghua Chen, Yan Luo, Pu Yang, Baili FengAbstractTo elucidate the mechanism by which intercropping proso millet (Panicum miliaceum L.) with mung bean (Vigna radiata L.) increases proso millet yield and to determine how this higher yield results from maximization of resources use efficiency, we designed and conducted four strip intercropping row arrangements, including two rows of proso millet alternating with two rows of mung bean (2P2M), four rows of proso millet alternating with two rows of mung bean (4P2M), four rows of proso millet alternating with four rows of mung bean (4P4M), two rows of proso millet alternating with four rows of mung bean (2P4M), sole proso millet (SP, control) and sole mung bean (SM, control) in Yulin, Shaanxi, China. Photosynthetically active radiation (PAR) in the canopy, radiation use efficiency (RUE), leaf photosynthetic characteristics, dry matter accumulation and allocation, and yield of proso millet were investigated. The results showed that the intercropping systems had higher PAR than the monoculture. Mean PAR intensities were increased by respectively 2.2%–23.4%, 19.8%–59.7%, and 61.2%–133.3% in the proso millet upper, middle and lower canopies compared with SP. The increase in PAR directly increased RUE, a result attributed mainly to the increase in photosynthetic capacity, including net phot...
Source: The Crop Journal - Category: Food Science Source Type: research