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中文摘要：
通过对羊草人工草地返青期、拔节期、孕穗期的羊草喷施不同浓度的脱落酸（ABA）,分析了脱落酸对羊草产量及品质的影响.结果表明：不同浓度的脱落酸对羊草产量和品质均比对照有所提高,以0.01 mmol/L的处理效果最佳,株高、地上部分干重分别比对照提高5.17%和3.85%,中性洗涤纤维（NDF）、酸性洗涤纤维（ADF）、粗蛋白质（CP）含量分别比对照提高3.94%,6.15%,16.14%.喷施脱落酸可提高羊草产量,改善羊草品质.
英文摘要：
The paper dealt with the improvements of the yield and the quality of Leymus chinensis growing in the sown grassland by spraying plant growth regulators,namely abscisic acid（ABA）,over it.Sprayed the grass with ABA at turning green stage,jointing stage and boot stage,respectively.The results showed： both the yield and the quality of Leymus chinensis were increased by spraying ABA of different concentrations over it compared to the control.The height and the dried weight of it sprayed with the optimal concentration of 0.01 mmol/L were increased 5.17% and 3.85%,and the contents of NDF,ADF and CP were increased 3.94%,6.15% and 16.14%.In all,spraying ABA over Leymus chinensis improved the yield and the quality of it.
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