Relationship of field microclimate and population yield in maize-soybean relay strip intercropping system

doi:10.3969/j.issn.1004-1524.2016.11.02

›› 2016, Vol. 28 ›› Issue (11): 1812-1821.DOI: 10.3969/j.issn.1004-1524.2016.11.02

• Crop Science • Previous Articles Next Articles

Relationship of field microclimate and population yield in maize-soybean relay strip intercropping system

CHEN Guo-peng, WANG Xiao-chun^*, PU Tian, ZENG Hong, CHEN Cheng, PENG Xiao, DING Guo-hui, WANG Rui, YANG Wen-yu

College of Agronomy, Sichuan Agricultural University / Key Laboratory of Crop Physiology, Ecology and Cultivation in Southwest, Ministry of Agriculture, Chengdu 611130, China

Received:2016-03-16 Online:2016-11-15 Published:2016-11-16

Abstract

Abstract: The main objective of this study was to evaluate the effects of different wide rows spacing (A1: 1.2 m, A2: 1.3 m, A3: 1.4 m, A4: 1.5 m, A5: 1.6 m, A6: 1.7 m, A7: 1.8 m) at same rnarrow maize row spacing(0.4 m) treatment on the field microclimate and crops total yield in maize-soybean relay strip intercropping system. The results indicated that soil temperature increased firstly and then decreased during the whole growth period of maize with increasing of strip width, and A4 had the hightest temperature (26.2 ℃), which was 0.6 ℃ higher than monoculture. On the contrary, field temperature decreased at first and then increased during the middle and later growth stage of maize, and A6 had the highest temperature (26.25℃), which was 1.15 ℃ higher than A4. Effect of strip width on transmittance at silking stage was highter than the other growth stages, A1 had the hightest ransmittancet and significant increased by 11.2% compared with monoculture. Compared with monoculture, intercropping significant improved the light energy utilization rate, the transmittance increased firstly and then decreased with the increasing of strip width, and A5 was the highest among all treatments, which was 26.52% and 20.51% highter than monoculture and A7, respectively. Total yield and economic benefit of A5 were the hightest, and increased by 14.35%, 19.46% and 16.77%, 26.84% compared with A7 and monoculture, respectively. Soil water content, field temperature and CO₂ concentration of maize canopy were main factors influencing maize grain yield, while soil temperature and transmittance of row middle was important factors for soybean. Selecting an adaptable strip width to coordinate the interaction between bandwidth and climate factor, reducing inter specific competition between maize and soybean, optimizing the climate resource allocation, creating the suitable field microclimate factors for maize and soybean growth were important for achieving high yield in maize-soybean strip intercropping system.

Key words: bandwidth, field microclimate, yield, maize, maize-soybean relay strip intercropping

CLC Number:

S513

CHEN Guo-peng, WANG Xiao-chun, PU Tian, ZENG Hong, CHEN Cheng, PENG Xiao, DING Guo-hui, WANG Rui, YANG Wen-yu. Relationship of field microclimate and population yield in maize-soybean relay strip intercropping system[J]. , 2016, 28(11): 1812-1821.

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Relationship of field microclimate and population yield in maize-soybean relay strip intercropping system

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