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Effects of Different Row Spacings of Maize on Light Environment, Morphological Characteristics and Yield of Soybeans in a Relay Intercropping System(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2015年04期
Page:
611-615
Research Field:
Publishing date:

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Title:
Effects of Different Row Spacings of Maize on Light Environment, Morphological Characteristics and Yield of Soybeans in a Relay Intercropping System
Author(s):
GAO Ren-caiYANG Feng LIAO Dun-ping SU Ben-ying CUI Liang DENG Chuan-rong YANG Wen-yu
College of Agronomy, Sichuan Agricultural University/Key Laboratory of Crop Ecophysiology and Farming System in Southwest, Ministry of Agriculture, Chengdu 611130, China
Keywords:
Maize and soybean relay intercropping PAR transimittance R/Fr Root-shoot ratio Biomass
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2015.04.0611
Abstract:
In order to clarify the impacts of different row spacings on soybeans in soybean relay intercropping with maize of 200 cm strip width, five treatments were set with different row spacings which were 20 cm (P1), 40 cm (P2), 60 cm (P3), 80 cm(P4) and 100 cm (P5). We analyzed the changes of light environment under different narrow row spacings and its impact on soybean plant morphology and yields of the two crops.The results showed that: (1) the photosynthetic active radiation (PAR) and Red/Far-red (R/Fr) value of the relay intercropping soybean layer decreased when row spacing increased; (2) Similar to PAR and R/Fr, the stem diameter, root length, shoot biomass, root weight as well as root-shoot ratio of relay intercropping soybean also increased.The maxima of each parameter were all obtained in P1 treatment with corresponding value of 2.02 mm, 8.5 cm, 0.25 g, 0.034 g, and 0.14 respectively. In contrast, plant height of soybeans in relay intercropping was decreased with a maximum of 31.9 cm in P5 treatment (3) The highest yield was 1 472 kg.hm-2?obtained in P1 treatment, but there was no significant difference between P1 treatment and P2 treatment.Yield of soybeans decreased with increased row spacing, which was significantly and highly significant correlated with the PAR transmittance and R/Fr, respectively. It is proposed that the narrow row spacings between 20 and 40 cm can be benefit for the light environment, recovery and yield of soybeans in the system.

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Last Update: 2015-08-31