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首页> 外文期刊>Range Management & Agroforestry >Nutrient content and biomass production in tropical range grasses and legumes under different light intensities
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Nutrient content and biomass production in tropical range grasses and legumes under different light intensities

机译：不同光强下热带牧草和豆科植物的养分含量和生物量生产。

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Seventeen promising tropical range grasses and two legumes were studied for nutrient content and biomass production under different light intensities in semi arid region under rain fed conditions. In most of the grasses and legumes, maximum biomassproduction was recorded under 75 percent light intensity. Tri specific hybrid produced higher green and dry matter yield (DMY) followed by Pennisetum polystachyon, Panicum maximum, Cenchrus ciliaris and Setaria sphacelata under high shading conditions i.e. 50 percent and 25 percent light intensities indicating their shade adaptation compared to other grass species tested. The higher accumulation of nitrogen in leaves and crude protein under moderate shading shows that these grasses are able to maintaintheir quality even under shading environment. Magnesium content increased with decreasing light intensity. Higher potassium content was estimated in Brachiaria brizantha, Pennisetum polystachyon, Brachiaria decombens, Bothriochloa bladhii, Panicum antidotale and Tri specific hybrid under moderate shading environment. In most of the species maximum phosphorus content in leaves was estimated under 50 percent and 25 percent shading condition and it was higher under high shading conditions compared to the open grown grasses and legumes. In general the calcium content in leaves decreased with decreasing light intensity. The biomass production in term of DMY appears to be more closely related with the nutrient accumulation in leaves. In leaves of most of thegrasses maximum sugar content accumulated under 75 percent light intensity, whereas, starch accumulation was maximum under 75 percent and 50 percent light intensities.
机译：在半干旱地区雨养条件下，研究了十七种有前途的热带草和两种豆科植物在不同光照强度下的养分含量和生物量生产。在大多数草和豆类中，在75％的光强度下记录到最大的生物量生产。在高遮荫条件下（即50％和25％的光照强度），三特异性杂种产生的绿化和干物质产量（DMY）更高，其次是狼尾草，百日草，Cenchrus ciliaris和Setaria sphacelata，与其他测试的草种相比，它们的阴影适应性更高。在适度的遮荫下，叶片和粗蛋白中氮的累积量更高，表明这些草即使在遮荫环境下也能够保持其品质。镁含量随着光强度的降低而增加。在中等遮荫环境下，估计Brachiaria brizantha，狼尾草Penchisetum，Brachiaria decombens，Bothriochloa bladhii，Panicum antidotale和Tri特异性杂种中的钾含量更高。在大多数物种中，在50％和25％的遮荫条件下，叶片中的最大磷含量估计为，而在高遮荫条件下，则比开放种植的草和豆类更高。通常，叶片中的钙含量随着光强度的降低而降低。以DMY表示的生物量生产似乎与叶片中养分的积累更紧密相关。在大多数草叶中，在75％的光照强度下积累的最大糖含量，而在75％和50％的光照强度下积累的淀粉最大。

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