密度对紫穗草形态特征、产量及化学成分的影响舒马赫)

T. Zewdu
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引用次数: 15

摘要

密度对紫穗草(Pennisetum purpureum)形态特征、干物质产量及化学成分影响的试验研究舒马赫)于2004年和2005年在埃塞俄比亚东部的哈拉马亚大学进行。行距为1.5、1和0.5m,株距为0.75、0.5和0.25m的9个处理,分别为8,888.9、13,333.3、26,667.7、13,333.3、20,000、40,000、26,667.7、40,000和80,000株/ ha,采用随机完全区组设计,3个重复。小区大小为3m宽x6m长,重复与小区间距分别为1.5m和1m。建立年份不同密度对纳匹尔草的形态特征无显著影响(P > 0.05)。分蘖数、总叶数、节间数、节间长、基周长和单株叶长均受密度影响显著(P < 0.05)。但各处理的粗蛋白质(CP)含量均在15%以上,为动物生长或生产所需的最佳水平。纤维组分也低于影响牛DM采食量的阈值水平(600 g/kg DM)。根据DM产量和CP含量,建议埃塞俄比亚东部农业生态地区的畜牧生产者每公顷种植4万株Napier草。关键词:化学成分;干物质产量;形态特征;纳皮尔草;植物密度东非科学杂志Vol. 2 (1) 2008: pp. 55-61
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of Plant Density on Morphological Characteristics, Yield and Chemical Composition of Napier Grass ( Pennisetum purpureum (L.) Schumach)
An experiment to assess the effect of plant density on morphological characteristics, dry matter production and chemical composition of Napier grass ( Pennisetum purpureum (L.) Schumach) was conducted in 2004 and 2005 at Haramaya University, eastern Ethiopia. There were a total of nine treatments with 1.5, 1 and 0.5m spacing between rows and 0.75, 0.5 and 0.25m spacing between plants, which consisted of 8,888.9, 13,333.3, 26,667.7, 13,333.3, 20,000, 40,000, 26,667.7, 40,000, and 80,000 plants per ha, arranged in a randomized complete block design with three replications. The plot size was 3m width x 6m length and the spacings between replications and plots were 1.5m and 1m respectively. There was no significant (P > 0.05) effect in morphological characteristics of Napier grass due to plant density during the establishment year. However, the number of tillers, total leaves, internode number, internode length, basal circumference and leaf length per plant were significantly (P 0.05) effect on the chemical composition of Napier grass due to plant density. However, the crude protein (CP) content of all the treatments was above 15%, which is the optimum required for animal growth or production. The fibre fractions were also below the threshold level (600 g/kg DM) at which DM intake of cattle is affected. Based on DM yield production and CP content, the production of Napier grass using 40, 000 plants per hectare is recommended to livestock producers in eastern Ethiopia agro-ecologies of the country. Keywords : Chemical Composition; Dry Matter Yield; Morphological Characteristics; Napier Grass; Plant Density East African Journal of Sciences Vol. 2 (1) 2008: pp. 55-61
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