Effect of intercropping on maize grain yield and yield components  

作　　者：HUANG Cheng-dong LIU Quan-qing LI Xiao-lin ZHANG Chao-chun 

机构地区：[1]College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, P.R.China [2]Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing 100193, P.R.China [3]Institute of Agricultural Resources & Environment, Hebei Academy of Agricultural and Forestry Sciences, Shijiazhuang 050051,P.R.China

出　　处：《Journal of Integrative Agriculture》2019年第8期1690-1700,共11页农业科学学报（英文版）

基　　金：supported by the National Key R&D Program of China (2017YFD0200107, 2016YFE0101100 and 2017YFD0200207);the National Basic Research Prgram of China (973 Program) (2015CB150400)

摘　　要：Smallholders in developing countries commonly use intercropping to produce crops with higher yield and value. Many intercropping studies have been conducted under experimental conditions, but few studies have been performed in farmers’ fields. We conducted a 4-year study using data from real farms to examine the relationships between yield and yield components of intercropped maize in the North China Plain. Three field experiments were conducted to compare the suitability of different maize varieties in intercropping. In the farm study, the grain yield of maize intercropped with watermelon was reduced by more than one third as compared to maize in wheat-maize double cropping, mainly due to lower ear density and lower 100-grain weight. Under real farm conditions, the yield of intercropped maize increased with increasing ear density and 100-grain weight, while yield of sole maize increased with increasing grain number per ear and 100-grain weight. In the field experiments, the maize cultivars commonly used in double cropping gave similar yields when grown in the intercropping system and their yields were closely related to ear density and 100-grain weight. Our results demonstrated that ear density, rather cultivar, was a key factor affecting the productivity of intercropped maize. Therefore,maintaining high ear density is a practical way for promoting productivity of maize in farmers’ intercropping practices.Smallholders in developing countries commonly use intercropping to produce crops with higher yield and value. Many intercropping studies have been conducted under experimental conditions, but few studies have been performed in farmers’ fields. We conducted a 4-year study using data from real farms to examine the relationships between yield and yield components of intercropped maize in the North China Plain. Three field experiments were conducted to compare the suitability of different maize varieties in intercropping. In the farm study, the grain yield of maize intercropped with watermelon was reduced by more than one third as compared to maize in wheat-maize double cropping, mainly due to lower ear density and lower 100-grain weight. Under real farm conditions, the yield of intercropped maize increased with increasing ear density and 100-grain weight, while yield of sole maize increased with increasing grain number per ear and 100-grain weight. In the field experiments, the maize cultivars commonly used in double cropping gave similar yields when grown in the intercropping system and their yields were closely related to ear density and 100-grain weight. Our results demonstrated that ear density, rather cultivar, was a key factor affecting the productivity of intercropped maize. Therefore,maintaining high ear density is a practical way for promoting productivity of maize in farmers’ intercropping practices.

关 键 词：MAIZE EAR DENSITY INTERCROPPING double CROPPING CULTIVARS 

分 类 号：S[农业科学]