Effect of Fall Harvest on Roots Organic Reserves of Alfalfa

doi:10.11733/j.issn.1007-0435.2016.02.028

Acta Agrestia Sinica ›› 2016, Vol. 24 ›› Issue (2): 433-440.DOI: 10.11733/j.issn.1007-0435.2016.02.028

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Effect of Fall Harvest on Roots Organic Reserves of Alfalfa

WANG Ying-zhe^1,2, XU Bo³, SUN Yu-kun³, XU An-kai², SUN Qi-zhong¹

1. Grassland Research Institute, Chinese Academy of Agriculture Science, Hohhot, Inner Mongolia 010010, China;
2. Agriculture Sciences of Jilin Province, Gongzhuling, jilin Province 136100, China;
3. Jilin Agriculture university, Changchun, Jilin Province 130118, China

Received:2014-12-25 Revised:2015-03-25 Online:2016-04-15 Published:2016-06-06

秋季刈割对紫花苜蓿主根贮藏有机物质的影响

王英哲^1,2, 徐博³, 孙雨坤³, 徐安凯², 孙启忠¹

1. 中国农业科学院草原研究所, 内蒙古呼和浩特 010010;
2. 吉林省农业科学院畜牧科学分院, 吉林公主岭 136100;
3. 吉林农业大学动物科学技术学院, 吉林长春 130118

通讯作者: 孙启忠
作者简介:王英哲(1985-),女,吉林长春人,博士研究生,研究方向为牧草栽培与利用,E-mail:yingzhe120@163.com
基金资助:
公益性行业(农业)科研专项经费项目(201203042)资助

Abstract

Abstract:

In order to explore the fall harvest at different GDD affects roots organic reserves in alfalfa, over-winter rate and the yield at the first harvest the following year were investigated in middle-eastern section of Jilin Province from 2013 to 2014 with Medicago sativa L.cv.Gongnong No.1. Fall harvest treatments were no additional fall harvest or a third fall harvest applied at 900, 1000, 1100, 1200 growing degree-days (GDD) after the second harvest. Measured root concentrations of total nonstructural carbohydrates and N reserves during overwinter, and the results showed that the over-winter rate and the first harvest yield in the third harvest taken at 1000 GDD after the second harvest were significant higher than that of other fall harvest treatments(P < 0.05), and no significant difference was found between no additional fall harvest treatment. During the winter, root total nonstructural carbohydrates and N reserves of alfalfa were increased initially and then reduced. In conclusion, it's available for fall harvest in middle-eastern section of Jilin Province as long as an interval of 1000GDD was kept between the last summer harvest and the fall harvest.

Key words: Alfalfa, Growing degree-days (GDD), Root total nonstructural carbohydrates, Root N reserves

摘要：

为了解秋季刈割对紫花苜蓿根贮有机物质在越冬期间变化情况及对翌年越冬率、头茬产量的影响,本文以‘公农1号’紫花苜蓿为试验材料,测定第二次刈割后900GDD,1000GDD,1100GDD,1200GDD刈割的紫花苜蓿在2013年秋末至2014年初春越冬期间主根中非结构性碳水化合物和含氮化合物的含量。结果表明:种植翌年,第二次刈割后1000GDD刈割的紫花苜蓿越冬率及头茬产量显著高于其他刈割处理(P < 0.05),与未刈割处理间差异不显著;整个越冬期间,紫花苜蓿根贮藏性有机物质含量呈先上升后下降的趋势。综上所述,吉林省中东部地区秋季刈割具有可行性,且在第二次刈割后1000GDD时刈割不会影响牧草翌年产量。

关键词: 紫花苜蓿, 生长度日, 根贮非结构性碳水化合物, 根贮含氮化合物

CLC Number:

S541.9

WANG Ying-zhe, XU Bo, SUN Yu-kun, XU An-kai, SUN Qi-zhong. Effect of Fall Harvest on Roots Organic Reserves of Alfalfa[J]. Acta Agrestia Sinica, 2016, 24(2): 433-440.

王英哲, 徐博, 孙雨坤, 徐安凯, 孙启忠. 秋季刈割对紫花苜蓿主根贮藏有机物质的影响[J]. 草地学报, 2016, 24(2): 433-440.

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Effect of Fall Harvest on Roots Organic Reserves of Alfalfa

秋季刈割对紫花苜蓿主根贮藏有机物质的影响

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