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贵州灌丛草地几种常见灌木和草本类牧草营养成分含量变化规律研究 被引量:15

Study on Changing Low of Nutritive compositlon of Some Major Herbages in Grass-heath in Guizhou.
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摘要 贵州灌丛草地中常见的几种主要灌木为火棘、贵州金丝桃和小果蔷薇,草本类牧草主要是以中禾草为主的可食草类。其地上可被山羊采食部份的粗蛋白质、粗脂肪和粗灰分含量均随植物体的生育阶段增加呈线性下降;粗纤维含量则呈线性上升;无氮浸出物含量则在开花结实前后最高。季节性规律为:粗蛋白质、粗脂肪和粗灰分在春季高、夏季低,秋季又有所回升,冬季又逐渐下降;粗纤维夏季明显高于其它季节;无氮浸出物含量在秋末冬初最高。 The major shrubs in Guizhou Srass-heath are Pyracantha Fortuneana、Hypercum Rouytcheouense、Rosa Gymosa,and other grasses. The crude-protein,crude-fat and ash contents of the abovegrouna parts of these plants and their increased with grouth stage proceeding and their ADF.appears a linear rise. Their N-free extract is maximum at blooming-fruiting stage. Crude-protein、crude-fat and ash contents rise in Spring , de-crease in Summer. rise again in autumn, and finally decrease in Winter. ADF is higher in Summer than in another season. N-free extract is maximum in late autumn and early Winter
出处 《中国草地》 CSCD 1994年第4期54-58,共5页 Grassland of China
基金 贵州省自然科学基金
关键词 灌丛草地 灌木 中禾草 营养成分 Grass-heath Shrub Middle-grass Nutritive composition
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