Dynamics of Interspecific Competition of Legume-Grass Mixture under Different Mixed Sowing Patterns

doi:10.11733/j.issn.1007-0435.2010.04.016

›› 2010, Vol. 18 ›› Issue (4): 568-575.DOI: 10.11733/j.issn.1007-0435.2010.04.016

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Dynamics of Interspecific Competition of Legume-Grass Mixture under Different Mixed Sowing Patterns

ZHENG Wei^1,2, ZHU Jin-zhong^1,2, Kuerban^1,2, ZHANG Qiang-qiang^1,2, Jianaerguli^1,2, LI Hai³

1. College of Pratacultural and Environmental Science, Xinjiang Agricultural University, Urumqi, Xinjiang Uygur Autonomous Region 830052, China;
2. Xinjiang Key Laboratory of Grassland Resources and Ecology, Urumqi, Xinjiang Uygur Autonomous Region 830052, China;
3. Grassland Station of Zhaosu Horse Farm, Zhaosu, Xinjiang Uygur Autonomous Region 834500, China

Received:2010-04-15 Revised:2010-07-02 Online:2010-08-15 Published:2010-08-15

不同混播方式下豆禾混播草地种间竞争动态研究

郑伟^1,2, 朱进忠^1,2, 库尔班^1,2, 张强强^1,2, 加娜尔古丽^1,2, 李海³

1. 新疆农业大学草业与环境科学学院, 乌鲁木齐, 830052;
2. 新疆维吾尔自治区草地资源与生态重点实验室, 乌鲁木齐, 830052;
3. 新疆昭苏马场草原站, 昭苏, 834500

通讯作者: 朱进忠,E-mail:xjauzjz@126.com
作者简介:郑伟(1978- ),男,湖北武汉市人,博士,在读博士后,研究方向为草地生态及植物生态,E-mail:zw065@sina.com.
基金资助:
“十一五”农业部公益性行业科研专项(3-36);新疆草地资源与生态自治区重点实验室开放课题(XJDX0209-2008-04)资助

Abstract

Abstract: The relative intensity of interspecific competition was investigated to reveal the approach of sustainable utilization and community stability in legume-grass mixed sowing patterns.The dynamics of interspecific relationship in four legume-grass combinations: 6 species mixture,5 species mixture,4 species mixture,3 species mixture at three rowing ratios: 5:5,4:6,3:7 were studied.Stem height,relative density(RD),relative yield total(RYT) and interspecific competition rate(CR) were measured under different legume-grass mixed sowing patterns.The results showed that the stem height of both grass and red clover(Trifolium pratense) under mixed sowing patterns was lower than that of each under singled sowing patterns.However,the forage height of both alfalfa(Medicago varia) and sainfoin(Onobrychis viciaefolia) was higher than that of each under singled sowing patterns.The forage height was increased rapidly during May 16 to July 1.Both RD_l and RD_g was significant higher than 1(P<0.05) for all the checked points and reached the highest during May 16 to June 1.RD_l decreased with increasing row ratio of legume,whereas RD_g increased.RYT was significant higher than 1(P<0.05) only at one check point May 16.In summer,RYT was lower than other period.Grass CR_i gradually decreased during the period from May 1 to June 16,then increased after June 16.However,legume CR_j gradually increased and then decreased during the same time.Grass CR_i was stronger than that of legume at the most period.The interspecific competition was affected by light resources under different mixed sowing species and ratios,while temperature was another significant factor.

Key words: Legume-grass mixture, Mixed sowing species, Mixed sowing ratios, Interspecific competition

摘要： 以红豆草(Onobrychis viciaefolia)、紫花苜蓿(Medicago sativa)、红三叶(Trifolium pratense)、鸭茅(Dactylis glomerata)、无芒雀麦(Bromus inermis)和猫尾草(Phleum pratense)6种豆禾牧草在混播种类为6、5、4、3及豆禾比为5:5、4:6、3:7的条件下建立混播草地,测定株高、相对密度(RD)、相对产量总和(RYT)及竞争力(CR),比较其种间竞争的相对激烈程度及种间竞争关系动态,探讨不同混播方式豆禾混播草地稳定持续利用的可能途径。结果表明:各混播处理禾草、红三叶株高均低于单播处理,混播红豆草、紫花苜蓿则高于单播,2009年5月16日~7月1日是株高增长的快速期;各混播处理下RD₁和RD_g值在各测定时期均显著高于1(P<0.05),5月16日~6月1日期间RD_l和RD_g值出现了峰值,豆禾比越高则RD_l值越低、RD_g值越高;各混播处理下RYT值仅在5月16日显著高于1(P<0.05),且出现了明显的夏季低谷期;5月1日~6月16日禾草CR_i值逐渐下降,豆科牧草CR_j值逐渐上升,之后禾草CR_i值上升,豆科牧草CR_j值下降,禾草竞争力大部分时期大于豆科牧草。说明不同混播种类和混播比例组合主要通过光资源竞争改变种间竞争关系,而温度对豆禾混播牧草种间竞争关系也有明显影响。

关键词: 豆禾混播草地, 混播种类, 混播比例, 种间竞争

CLC Number:

S812.4

ZHENG Wei, ZHU Jin-zhong, Kuerban, ZHANG Qiang-qiang, Jianaerguli, LI Hai. Dynamics of Interspecific Competition of Legume-Grass Mixture under Different Mixed Sowing Patterns[J]. , 2010, 18(4): 568-575.

郑伟, 朱进忠, 库尔班, 张强强, 加娜尔古丽, 李海. 不同混播方式下豆禾混播草地种间竞争动态研究[J]. , 2010, 18(4): 568-575.

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Dynamics of Interspecific Competition of Legume-Grass Mixture under Different Mixed Sowing Patterns

不同混播方式下豆禾混播草地种间竞争动态研究

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