苜蓿不同留茬高度对低温胁迫的响应及抗寒能力评价

doi:10.11843/j.issn.0366-6964.2018.02.013

摘要/Abstract

摘要：

旨在探究末茬苜蓿不同留茬高度在越冬期间对低温胁迫的响应及抗寒性能力的强弱。本研究以“金皇后”（Medicago sative L. “Gold empress”）、“准格尔”（Medicago sative L. “Zhungeer”）、“WL323”（Medicago sative L. “WL323”）为试验材料，测定3个苜蓿品种的4种留茬高度（0、0~5、5~10、10~15 cm）在自然环境下根内可溶性糖（WSS）、可溶性蛋白（SP）、脯氨酸（Pro）、丙二醛（MDA）含量及超氧化物歧化酶（SOD）和过氧化氢酶（CAT）活性，综合评价各苜蓿品种及其末茬不同留茬高度的抗寒能力。结果表明：1）可溶性糖、脯氨酸、可溶性蛋白和过氧化氢酶活性随气温降低而升高，随气温升高而降低；超氧化物歧化酶活性和丙二醛含量在不同品种、不同留茬高度之间随气温变化规律不同。2）综合评价3个苜蓿品种抗寒能力强弱：准格尔 > 金皇后 > WL323，同一苜蓿品种末茬不同留茬高度抗寒能力强弱为A3 > A2 > A1 > A0。不同苜蓿品种抗寒能力不同，建议末茬留茬高度为10~15 cm。

Abstract:

The aim of this study was to investigate the effect of stubble height on the response to the low temperature and cold-resistance overwintering. Three alfalfa cultivars of "Gold empress", "Zhungeer" and "WL323" were selected as experimental materials. The alfalfa with 4 stubble heights(0, 0-5, 5-10, 10-15 cm)were measured for the water soluble sugar(WSS), proline(Pro), MDA, soluble protein(SP) contents, SOD and CAT activities in the roots under natural environment, the cold-resistance of different cultivars with different stubble heights were evaluated comprehensively. The results showed that:1) The WSS, Pro, SP contents and CAT activity showed opposite trend to temperature; the trend of SOD activity and MDA content of different cultivars and stubble heights showed different variation with the temperature variation. 2) The cold-resistance of different alfalfa cultivars were "Zhungeer" > "Gold empress" > "WL323", and the cold-resistance of the same alfalfa cultivar with different stubble heights were A3 > A2 > A1 > A0. The results indicate that the cold-resistance of different alfalfa cultivars are different, and the recommended stubble height is 10-15 cm.

中图分类号:

S816.5

王伟, 贾玉山, 格根图, 降晓伟, 尹强. 苜蓿不同留茬高度对低温胁迫的响应及抗寒能力评价[J]. 畜牧兽医学报, 2018, 49(2): 338-347.

WANG Wei, JIA Yu-shan, GE Gen-tu, JIANG Xiao-wei, YIN Qiang. Field Evaluation of the Response and Resistance to Low Temperature of Alfalfa with the Different Stubble Heights during Overwintering[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2018, 49(2): 338-347.

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