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The alteration of interspecific interaction responded to various relative sowing time in wheat/maize intercropping

文献类型： 外文期刊

作者： Sun, Jun-Wei 1 ; Zhu, Ying-An 1 ; Pang, Yu 1 ; Liu, Chen-Xi 1 ; Sun, Jian-Hao 2 ; Zhang, Wei-Ping 3 ; Li, Long 3 ; Liu, Yi-Xiang 1 ;

作者机构： 1.Yunnan Agr Univ, State Key Lab Conservat & Utilizat Bioresources Yu, Kunming, Peoples R China

2.Gansu Acad Agr Sci, Inst Soils Fertilizers & Water Saving Agr, Lanzhou, Peoples R China

3.China Agr Univ, Coll Resources & Environm Sci, Key Lab Plant & Soil Interact, Chinese Minist Educ, Beijing, Peoples R China

4.Yunnan Agr Univ, Key Lab Agrobiodivers & Pest Control, Minist Educ, Kunming, Peoples R China

关键词： sowing time; maximum growth rate; temporal niche; spatial niche; yield advantage

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：4.8； 五年影响因子：5.7 ）

ISSN： 1664-462X

年卷期： 2024 年 15 卷

页码：

收录情况： SCI

摘要： Introduction An interspecific interaction is an important reason for the yield advantage of interspecific cropping compared with sole cropping, and the relative sowing time of species is an important factor affecting interspecific competitiveness. Our purpose was to explore the effects of different relative sowing times on the interspecific competition-recovery phenomenon in wheat and maize intercropping systems.Methods Three planting methods (wheat/maize intercropping, wheat and maize sole cropping) and different relative sowing times of wheat were used to carry out field experiments over two years. Sequential harvest of subplots was performed between 3 and 6 times, and the biomass data were fitted to logistic growth model.Results Delaying the sowing time of wheat reduced the wheat yield, biomass and nutrient acquisition and increased those of maize, but wheat still had an intercropping advantage during the co-growth period. At the same time, the nutrient acquisition of maize was still inhibited, but its recovery growth advanced. Changing the relative sowing time of wheat significantly changed the maximum instantaneous growth rates of wheat and maize. Delaying the relative sowing time of wheat significantly reduced its maximum instantaneous growth rate, while enhancing that of maize, leading to a balanced mutual benefit.Conclusions Delaying the sowing time of wheat to the same sowing time as maize will change wheat/maize intercropping from asymmetrical interspecific facilitation to symmetrical interspecific facilitation. However, in this case, intercropped wheat still had an interspecific competitive advantage in the co-growth stage, and intercropped maize still underwent a competition-recovery process.

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