| 施肥对羊草有性生殖影响的研究 |
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| 引用本文： | 王俊锋,穆春生,张继涛,高嵩,李晓宇.施肥对羊草有性生殖影响的研究[J].草业学报,2008,17(3):53-58. |
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| 作者姓名： | 王俊锋 穆春生 张继涛 高嵩 李晓宇 |
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| 作者单位： | 东北师范大学草地科学研究所,植被生态教育部重点实验室,吉林,长春,130024;东北师范大学草地科学研究所,植被生态教育部重点实验室,吉林,长春,130024;东北师范大学草地科学研究所,植被生态教育部重点实验室,吉林,长春,130024;东北师范大学草地科学研究所,植被生态教育部重点实验室,吉林,长春,130024;东北师范大学草地科学研究所,植被生态教育部重点实验室,吉林,长春,130024 |
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| 基金项目： | 国家自然科学基金
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教育部科学技术研究项目
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国家科技支撑计划
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东北师范大学分析测试基金 |
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| 摘 要： | 羊草是欧亚大陆东端草原带的主要建群种,然而在自然条件下有性繁殖能力低,种子产量少,严重制约着对它的人工利用。合理施肥是提高作物产量的有效途径之一,本研究运用正交试验设计的方法,研究不同时期施用N、P、K肥对羊草抽穗率、结实率和种子产量的影响。结果表明,不同时期施用N、P、K肥虽然对当年羊草的抽穗率和抽穗数均没有显著影响,但可显著提高羊草的结实率和结实粒数,从而提高羊草种子产量。从施肥种类和施肥时间上看,施用N、K肥和早期施肥对羊草结实和种子产量影响更大。经极差分析得出,理论上在5月羊草孕穗前期施用120 kg/hm2尿素、100 kg/hm2硫酸钾、不施用磷肥的组合为最佳组合。
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| 关 键 词： | 羊草 N、P、K肥 施肥时间 有性生殖 |
Effects of fertilizer on the. sexual reproduction of Leymus chinensis |
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| WANG Jun-feng,MU Chun-sheng,ZHANG Ji-tao,GAO Song,LI Xiao-yu.Effects of fertilizer on the. sexual reproduction of Leymus chinensis[J].Acta Prataculturae Sinica,2008,17(3):53-58. |
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| Authors: | WANG Jun-feng MU Chun-sheng ZHANG Ji-tao GAO Song LI Xiao-yu |
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| Abstract: | Leymus chinensis is the dominant species of eastern Eurasia steppes.However,it produces few seeds and has weak sexual reproduction in natural conditions,thus severely restricting its artificial utilization. Fertilization could be an efficient method for enhancing seed yield.We investigated the effects of nitrogen,phosphorus and potassium applied at various growth stages on heading percentage,seed-setting percentage and seed yield by orthodox design experiments.Nitrogen,phosphorus and potassium had no significant effect on heading percentage or heading number but did significantly enhance the seed-setting percentage and seed number.The effects of early application of nitrogen and potassium on setting and seed yield were more obvious.Using range analysis,we conclude that early application of 120 kg/hm2 urea and 100 kg/hm2 vitriol potassium(superphosqhate) is theoretically the best combination. |
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| Keywords: | Leymus chinensis N P and K fertilize fertilize time sexual reproduction |
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