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大麦/玉米间作优势及地上部和地下部因素的相对贡献研究
引用本文:刘广才,李隆,黄高宝,孙建好,郭天文,张福锁.大麦/玉米间作优势及地上部和地下部因素的相对贡献研究[J].中国农业科学,2005,38(9):1787-1795.
作者姓名:刘广才  李隆  黄高宝  孙建好  郭天文  张福锁
作者单位:1. 甘肃农业大学农学院,兰州,730070;中国农业大学资源与环境学院教育部植物与土壤相互作用重点实验室,北京,100094
2. 中国农业大学资源与环境学院教育部植物与土壤相互作用重点实验室,北京,100094
3. 甘肃农业大学农学院,兰州,730070
4. 甘肃省农业科学院土壤肥料研究所,兰州,730070
基金项目:国家重大基础研究发展项目(G1999011707)和国家自然科学基金项目(30070450)资助.
摘    要: 采用田间微区试验以及地下部种间根系分隔技术研究了玉米覆膜与不覆膜两种情况下大麦/玉米间作优势以及地上部和地下部因素对间作优势的相对贡献。结果表明,玉米不覆膜时,大麦/玉米间作籽粒和生物产量的LER均为1.06,无明显间作优势;玉米覆膜时,大麦/玉米间作籽粒和生物产量的LER分别为1.32和1.30,具有显著的间作优势。玉米不覆膜时,大麦/玉米间作系统养分吸收优势不显著;玉米覆膜时,间作系统具有显著的养分吸收优势。地上部和地下部因素对大麦/玉米间作中籽粒和生物产量间作优势的相对贡献,当玉米不覆膜时为间作劣势而无贡献;当玉米覆膜时,地上部、地下部因素对间作优势的相对贡献分别为80%和20%。当玉米覆膜时,地上部和地下部交互作用对间作氮素养分吸收的贡献具有同等重要性(各占50%);对磷吸收的贡献分别占60%与40%,钾则分别为45%与55%。

关 键 词:大麦/玉米间作  间作优势  地上部因素  地下部因素  相对贡献
收稿时间:02 5 2005 12:00AM
修稿时间:2005-02-05

Intercropping Advantage and Contribution of Above-Ground and Below-Ground Interactions in the Barley-Maize Intercropping
LIU Guang-cai,LI Long,HUANG Gao-bao,SUN Jian-hao,GUO Tian-wen,ZHANG Fu-suo.Intercropping Advantage and Contribution of Above-Ground and Below-Ground Interactions in the Barley-Maize Intercropping[J].Scientia Agricultura Sinica,2005,38(9):1787-1795.
Authors:LIU Guang-cai  LI Long  HUANG Gao-bao  SUN Jian-hao  GUO Tian-wen  ZHANG Fu-suo
Institution:1.College of Agronomy, Gansu Agricultural University, Lanzhou 730070; 2Key Laboratory of Plant and Soil Interactions, Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100094; 3Soil and Fertilizer Institute, Gansu Academy of Agricultural Sciences, Lanzhou 730070
Abstract:A microplot experiment and a root barrier technique were employed to investigate the intercropping advantage and the relative contribution of above-and below-ground interactions to the yield and nutrient uptaking in the barley-maize intercropping system with or without plastic sheet mulching.The results showed that the land equivalent ratios (LERs) of both grain yield and biomass were around 1 (average 1.06) for the intercropping of barley and maize without plastic sheet mulching,showing a yield disadvantage of the intercropping.In contrast,LERs with plastic sheet mulching were 1.32 for grain yield and 1.30 for biomass,indicating a significant yield advantage of the intercropping.There was no significant advantage of nutrient uptaking in the intercropping of barley and maize without plastic sheet mulching,whereas there was significant advantage of nutrient uptaking in the intercropping with plastic sheet mulching.The contribution of above-ground and below-ground interactions to the intercropping advantage of grain yield were 80% and 20%,respectively,for the intercropping with plastic sheet mulching.Similar results were observed for above-ground biomass.The contribution of above-ground and below-ground interactions to the increase of nutrient uptaking were 50% and 50% for nitrogen,60% and 40% for phosphorus,45% and 55% for potassium respectively,when intercropped maize was mulched with plastic sheet.
Keywords:Barley-maize intercropping  Yield advantage  Above-ground interaction  Below-ground interaction  Relative contribution
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