果园柱花草刈割处理对其与柑橘养分竞争的影响

园艺学报 ›› 2004, Vol. 31 ›› Issue (1): 11-15.

果园柱花草刈割处理对其与柑橘养分竞争的影响

姚青¹;朱红惠^2*;陈杰忠¹

(¹华南农业大学园艺学院, 广州510642; ²广东省微生物研究所, 广州510070)

收稿日期:2003-04-14 修回日期:2003-06-03 出版日期:2004-02-25 发布日期:2004-02-25
通讯作者: 朱红惠

Influence of Orchard Sod Mowing on Nutrient Competition between Citrussinensis and Stylosanthes gracilis and Mechanisms

Yao Qing¹;Zhu Honghui^2*;Chen Jiezhong¹

(¹College of Horticulture, South China Agricultural University, Guangzhou 510642, China; ²Guangdong Institute of Microbiology, Guangzhou 510070, China)

Received:2003-04-14 Revised:2003-06-03 Online:2004-02-25 Published:2004-02-25
Contact: Zhu Honghui

摘要/Abstract

摘要： 以‘萝岗’橙和柱花草为试材, 在根箱中研究了生草栽培体系中刈割对果树生长和养分竞争
的影响和机制。结果表明, 在低磷土壤中, 刈割可以显著减轻柱花草对磷的竞争, 促进柑橘的生长; 作用机制在于刈割强烈抑制了柱花草的根系生长, 使得根系长度显著降低, 空间分布也有所改变, 导致植株的磷含量、磷吸收量显著下降; 相应地, 柑橘根系对磷的表观吸收速率显著提高, 植株的磷含量、磷吸收量显著增加, 甚至达到施磷的效果, 根系长度也显著加长。认为刈割主要是通过对根系的影响来改变果树与生草之间养分竞争关系, 推测根系分布在养分竞争中占重要地位。

关键词: 柑橘, 生草栽培, 刈割, 养分竞争, 磷

Abstract: To investigate the influences of mowing on the fruit tree growth and nutrient competition in a sod culture system, and to elucidate the corresponding mechanisms, Citrus sinensis and Stylosanthes gracilis were grown in rhizoboxes as tested plants. The results showed that mowing significantly alleviated the grass competition for phosphorus , and promoted the citrus plant growth , in a low P soil . Mechanism analysis indicated that mowing
strongly inhibited the grass root growth , significantly decreased the total root length, and also changed the root system distribution, which resulted in a significant decrease in plant P content and P uptake. For citrus plants,the total root length and apparent P uptake rate of root were increased , P content and P uptake were significantly enhanced, to a comparable level with fertilized plants. It is suggested that mowing changed the competition status between fruit tree and grass through the influence on root system, and the root distribution pattern may play a important role in the nutrient competition.

Key words: Citrus, Sod culture, Mowing, Nutrient competition, Phosphorus

中图分类号:

S 666
Q 945

姚青;朱红惠;陈杰忠. 果园柱花草刈割处理对其与柑橘养分竞争的影响[J]. 园艺学报, 2004, 31(1): 11-15.

Yao Qing;Zhu Honghui;Chen Jiezhong. Influence of Orchard Sod Mowing on Nutrient Competition between Citrussinensis and Stylosanthes gracilis and Mechanisms[J]. ACTA HORTICULTURAE SINICA, 2004, 31(1): 11-15.

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