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Intercropping wheat between walnut trees reduced yield and improved quality

文献类型： 外文期刊

作者： Qiao, Xu 1 ; Gao, Yonghong 2 ; Xiao, Li 3 ; Lyu, Xinkai 1 ; Zhang, Caihong 4 ; Zhang, Yongqiang 2 ; Sai, Lihan 2 ; Xue, L 1 ;

作者机构： 1.Chinese Acad Med Sci, Inst Med Plant Dev, Peking Union Med Coll, Beijing 100193, Peoples R China

2.Xinjiang Acad Agr Sci, Inst Grain Crops, 403 Nan Chang Rd, Urumqi 830091, Xinjiang, Peoples R China

3.Xinjiang Acad Agr Sci, Sci Res Management Off, Urumqi 830091, Xinjiang, Peoples R China

4.Xinjiang Acad Agr Sci, Inst Agr Mech, Urumqi 830091, Xinjiang, Peoples R China

期刊名称：AGRONOMY JOURNAL （ 影响因子：1.683； 五年影响因子：2.095 ）

ISSN： 0002-1962

年卷期： 2021 年 113 卷 2 期

页码：

收录情况： SCI

摘要： Agroforestry is a common traditional practice in southern Xinjiang, northwest China. However, intercropping productivity has failed to meet expectations in many agroforestry systems as tree aged. Therefore, this study invested why this occurred. We chose walnut (Juglans regia L. Wen-185) tree-based agroforestry systems to investigate the influence of walnut tree shade intensity on the grain yield and quality of intercropped wheat (Triticum aestivum). This replicated study was conducted in Southern Xinjiang China in 2011 and 2012. Walnut tree canopy reduced understory photosynthetically active radiation, decreased photosynthetic rates of intercropped wheat, decreased grain yield, spike number, grains per spike, and thousand-grain weight. However, grain protein and wet gluten contents were improved. Significant negative linear correlations were detected between grain yield and N content with walnut tree age, but significant positive correlations were found between protein and wet gluten contents with walnut tree age. Protein and wet gluten contents were negatively correlated with grain yield, and with thousand-grain weight. In conclusion, although grain yield was significantly decreased, grain quality was enhanced in walnut tree-based agroforestry systems. The competition for light between walnut trees and intercrops could be alleviated by pruning, selective felling, and wider tree spacing.

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