| 大豆-柑桔间作系统中作物对磷的吸收利用特性 |
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| 引用本文： | 周卫军,王凯荣,李合松.大豆-柑桔间作系统中作物对磷的吸收利用特性[J].生态学报,2003,23(12):2565-2572. |
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| 作者姓名： | 周卫军 王凯荣 李合松 |
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| 作者单位： | 1. 中国科学院亚热带农业生态研究所,长沙,410125
2. 湖南农业大学,长沙,410125 |
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| 基金项目： | 中国科学院知识创新资助项目 (KZCX2 -40 7)~~ |
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| 摘 要： | 微区试验和^32P同位素示踪技术研究大豆-柑桔间作系统中大豆和柑桔对不同土层中磷的吸收特征表明，大豆-柑桔间作大豆与柑桔对浅层磷具有强烈竞争作用，大豆和柑桔对浅层磷的利用率分别降低41．5％和14．7％，浅层磷肥对大豆和柑桔的供应量分别降低346．8mg／区和148．1mg／区。柑桔对土壤深层磷的吸收能力比大豆强，单作大豆对浅层磷的利用率比单作柑桔高104．8％，而对35cm和55cm土层磷的利用率分别比单作柑桔低25．6％和878．3％。大豆基本不能利用55cm及其以下的磷，利用率小于0．1％。大豆-柑桔间作可以提高大豆对深层磷肥的利用率，间作大豆对35cm和55cm土层磷肥的利用率比单作大豆分别高32．3％和175．0％。
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| 关 键 词： | 大豆-柑桔间作系统 ^32P 磷肥 吸收 利用 大豆 |
| 文章编号： | 1000-0933(2003)12-2565-08 |
| 收稿时间： | 2002/5/25 0:00:00 |
| 修稿时间： | 2003/9/20 0:00:00 |
Characteristics of phosphorus uptake by plants in soybean (Glycine MaxL. merr) and citrus (Citrus poonensis Hort ex Tanaka) intercropping system |
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| ZHOU Weijun,WANG Kairong and LI Hesong.Characteristics of phosphorus uptake by plants in soybean (Glycine MaxL. merr) and citrus (Citrus poonensis Hort ex Tanaka) intercropping system[J].Acta Ecologica Sinica,2003,23(12):2565-2572. |
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| Authors: | ZHOU Weijun WANG Kairong and LI Hesong |
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| Institution: | Institute of Subtropical Agriculture; Chinese Academy of Sciences; Changsha; China |
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| Abstract: | The characteristics of ()~(32)P uptake by soybean and citrus among monoculture and intercropping systems were studied with field micro-plot trials and ()~(32)P isotope technique. A field experiment was conducted at Taoyuan Experimental Station of Agro-ecosystem Research of CAS from April to Jun in 2001. The experimental soil is acidic with pH of 4.45. The citrus tree were planted in plots of 3m×3m in row and line distance in Dec. 1995. The soybean was seeded 4 round around citrus tree within diameter of 3m ... |
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| Keywords: | soybean cirrus intercropping ecosystem ()~(32)P absorption characteristic |
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