Study on Morphological Formation Mechanism of Grazing Tolerance of Medicago falcata

doi:10.11733/j.issn.1007-0435.2016.01.005

Acta Agrestia Sinica ›› 2016, Vol. 24 ›› Issue (1): 35-41.DOI: 10.11733/j.issn.1007-0435.2016.01.005

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Study on Morphological Formation Mechanism of Grazing Tolerance of Medicago falcata

WANG Jun-jie¹, LV Shi-jie², WANG Ming-tao¹, WANG Dan¹, Badalahu³, JIANG Li-hong³, Chaoketu⁴

1. College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010019, China;
2. College of Science, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010018, China;
3. Grassland work station, Ewenke Banner, Bayantuohai, Inner Mongolia 021000, China;
4. Hulunbeier Institute of grassland, Hailaer, Inner Mongolia 021008, China

Received:2014-09-15 Revised:2015-10-12 Online:2016-02-15 Published:2016-04-26

黄花苜蓿个体水平耐牧性的形态学成因机制研究

王俊杰¹, 吕世杰², 王明涛¹, 王丹¹, 巴达拉呼³, 蒋立宏³, 朝克图⁴

1. 内蒙古农业大学生态环境学院, 内蒙古呼和浩特 010019;
2. 内蒙古农业大学理学院, 内蒙古呼和浩特 010018;
3. 内蒙古鄂温克自治旗草原工作站, 内蒙古巴彦托海 021100;
4. 内蒙古呼伦贝尔市草原研究所, 内蒙古海拉尔 021008

通讯作者: 王俊杰
作者简介:王俊杰(1962-),男,蒙古族,内蒙古呼伦贝尔市人,博士,教授,E-mail:jjw62@163.com
基金资助:
国家自然科学基金项目(31060323);内蒙古自然基金项目(2009MS0404);内蒙古科技计划项目(20091402);国家科技支撑项目(2012BAD13B07)资助

Abstract

Abstract:

In order to reveal the morphological formation mechanism of grazing tolerance of sickle alfalfa (Medicago falcata L.) and to explore the new way of grazing-tolerant alfalfa breeding, Two sickle alfalfa groups (strong and weak grazing tolerance) were used to observe a number of morphological traits before and after grazing. The results indicated that the correlation degree order of these traits with grazing tolerance was root collar width > crown depth > stem number > stem length. The determining degree for grazing tolerance was crown depth > root collar width > stem number > stem length > aboveground root collar width > stand projective coverage. The crown depth of Medicago falcata showed out a promoting effect independently on increasing the grazing tolerance, and other traits promoted the grazing tolerance by their interactions. The sickle alfalfa plants with broad and deep-set crowns, prolific branches and large stand showed high tolerance to grazing, and these traits can be used as morphological indicators for grazing-tolerant breeding program in early breeding.

Key words: Continuous grazing, Medicago falcata, Grazing tolerance, Morphology, Formation mechanism

摘要：

为揭示黄花苜蓿(Medicago falcata L.)耐牧性的形态学成因机制,探索其耐牧型品种选育的新途径。以从耐牧性鉴定中获得的耐牧性强和弱的2组黄花苜蓿个体植株为材料,对其放牧前后的相关形态指标的观测数据进行分析。结果表明:各形态指标与耐牧性强弱的显著性相关程度依次为根颈宽度>根颈入土深度> 茎数> 株高,对黄花苜蓿耐牧性的促进作用大小依次为根颈入土深度> 根颈宽度> 茎数> 株高> 株丛茎>植株投影盖度。根颈入土深度可单独增强黄花苜蓿的耐牧性,其他性状则通过相互协同作用促进其耐牧性。具有根颈粗大且入土深、单株茎数多且株丛大的黄花苜蓿植株耐牧性强,可作为耐牧育种材料早期选育的形态学指标。

关键词: 连续放牧, 黄花苜蓿, 耐牧性, 形态学, 成因机制

CLC Number:

S541.9

WANG Jun-jie, LV Shi-jie, WANG Ming-tao, WANG Dan, Badalahu, JIANG Li-hong, Chaoketu. Study on Morphological Formation Mechanism of Grazing Tolerance of Medicago falcata[J]. Acta Agrestia Sinica, 2016, 24(1): 35-41.

王俊杰, 吕世杰, 王明涛, 王丹, 巴达拉呼, 蒋立宏, 朝克图. 黄花苜蓿个体水平耐牧性的形态学成因机制研究[J]. 草地学报, 2016, 24(1): 35-41.

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Study on Morphological Formation Mechanism of Grazing Tolerance of Medicago falcata

黄花苜蓿个体水平耐牧性的形态学成因机制研究

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