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首页> 外文期刊>Annals of Forest Research >Nutrients composition changes in leaves of Quercus semecarpifolia at different seasons and altitudes
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Nutrients composition changes in leaves of Quercus semecarpifolia at different seasons and altitudes

机译：不同季节和海拔的栎类叶片营养成分变化

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Quercus semecarpifolia J.E. Smith leaves were collected for evaluation of chemical composition between four seasons i.e before growing season, after growing season, on growing season, on late maturity, respectively, in 2008-2009 from five geological isolated sites ranging from 2450 to 2725 m a.s.l. Seasonal variability (p < 0.01) was found in the chemical composition of the Q. semecarpifolia foliage. Dry matter and Ash Content significantly decreased in July (after growing season) as compared to the other months. Crude protein (CP) and phosphorus (P) contents significantly increased before growing season (January) and after growing season (July), finally declined in late maturation in October. Calcium contents and soluble protein (SP) significantly decreased before growing season (January) to late maturity (October), Ether extract (EE) decreased before growing season (January), after growing season (July) but increased in late maturity (October). Ash contents, CP, EE, P and SP exhibited significant variation among populations. CP was significantly higher in middle to higher altitudinal populations. P significantly decreased with increasing altitude. The rest of the studied mineral contents did not show any trend in the present study. The nutritive value of the leaves of Q. semecarpifolia was continually changing, especially CP and soluble protein. Q. semecarpifolia harvested at the proper stage of maturity (winter months) offers considerable potential as high quality forage for livestock to fulfill the deficiency of protein.
机译：在四个季节之间（即生长季节之前，生长季节之后，生长季节上，成熟末期）分别从2008年至2009年的5个地质孤立地点（2450至2725 m a.s.l.季节变化（p <0.01）在Q. semecarpifolia叶子的化学成分中发现。与其他月份相比，7月（生长季节后）的干物质和灰分含量显着下降。粗蛋白（CP）和磷（P）含量在生长期（1月）之前和生长期（7月）之后显着增加，最终在10月下旬下降。钙含量和可溶性蛋白（SP）在生长期（1月）至成熟期（10月）前显着降低，以太提取物（EE）在生长期（1月），生长期（7月）后下降，但在成熟后期（10月）增加。灰分，CP，EE，P和SP在种群之间表现出显着差异。 CP在中高海拔人群中明显更高。 P随高度增加而显着降低。其余的研究矿物质含量在本研究中没有显示任何趋势。七叶枫叶的营养价值在不断变化，尤其是CP和可溶性蛋白。在成熟的适当阶段（冬季）收获的七叶锦葵（Q. semecarpifolia）具有很大的潜力，因为高品质的牧草可以满足牲畜缺乏蛋白质的需求。

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