| 施氮水平和方式对王草生产特性和品质的影响 |
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| 引用本文： | 李威,温翠平,漆智平,唐树梅.施氮水平和方式对王草生产特性和品质的影响[J].草业科学,2012,29(8):1262-1271. |
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| 作者姓名： | 李威 温翠平 漆智平 唐树梅 |
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| 作者单位： | 中国热带农业科学院热带作物品种资源研究所,海南儋州,571737;海南大学农学院,海南儋州,571737 |
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| 基金项目： | 国家牧草产业技术体系岗位专家项目，中国土系调查与《中国土系志》编制项目 |
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| 摘 要： | 盆栽的试验条件下，研究不同施氮量和施氮方式对王草（Pennisetum purpureum×P.typhoideum）产量和品质的影响。结果表明，氮肥对王草的生产和品质有显著的促进作用，王草的干质量、株高、叶绿素SPAD值、含氮量和粗蛋白含量都与施氮量呈正相关，全磷、全钾、粗纤维含量与施氮量呈负相关。氮肥施用时期对产量和蛋白质含量的效应并不同步，同一刈割期内，同一施氮水平，在生长初期、分蘖期、拔节期分3次施入优于生长初期一次性施入，利于王草粗蛋白含量的提高，且只有分3次平均施入对干草产量影响显著（P<0.05）。王草生长的最佳盆栽施氮量为3.48 g·盆-1（纯氮180 kg·hm-2），施氮量为1.74～6.95 g·盆-1（纯氮90～360 kg·hm-2）时王草能正常生长，小于0.87 g·盆-1（纯氮45 kg·hm-2）或大于13.91 g·盆-1（纯氮720 kg·hm-2）对王草生长有限制，不施肥显著限制生产。在本试验条件下，最好的王草施肥方式是在生长初期、分蘖期和拔节期分3次平均施用。
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| 关 键 词： | 王草 施氮水平 施肥方式 产量 品质 |
Effects of different N feritilization modes and rates on the production and quality of king grass |
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| LI Wei,WEN Cui-ping,QI Zhi-ping,TANG Shu-mei.Effects of different N feritilization modes and rates on the production and quality of king grass[J].Pratacultural Science,2012,29(8):1262-1271. |
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| Authors: | LI Wei WEN Cui-ping QI Zhi-ping TANG Shu-mei |
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| Institution: | 1.Tropical Crops Genetic Resources Institute,CATAS,Danzhou 571737,China; 2.College of Agriculture,Hainan University,Danzhou 571737,China) |
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| Abstract: | In order to provide the reference about nitrogen rational use in king grass(Pennisetum purpureum × P.typhoideum)production,effects of different nitrogen levels and application methods on king grass growth and quality were studied by using pot culture experiment.The results indicated that N could improve yield and quality of king grass remarkably.The dry weight,plant height,the chlorophyll SPAD value,nitrogen(%) and crude protein contents(%) of the king grass had positive correlation with N application.The contents of phosphorus(%),potassium(%) and coarse fibre(%) had negative correlation with N application.The effect of N application at different periods on yield and crude protein content was not synchronization.Application N three times at different growth periods instead of one time at the beginning of growth period could remarkably increase the crude protein content.Further more,only application N three times with equal amount at different growth periods could conspicuously improved the dry weight of king grass.The most suitable N amount for king grass in our experiment was 3.48 g·pot-1(about 180 kg·ha-1 nitrogen).However,between 1.74~6.95 g·pot-1(90~360 kg·ha-1)the king grass could grow normally,less than 0.87 g·pot-1(45 kg·ha-1)or more than 13.91 g·pot-1(720 kg·ha-1)the growth was restricted;and no fertilization the growth was seriously retarded.Thus,the best fertilization way of king grass is to fertilize N with equal amount at stages of initial growth,tillering and jointing. |
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| Keywords: | king grass nitrogen level application method yield quality |
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