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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Dynamics of plant bioresources in Western Himalayan region of India - watershed based study.
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Dynamics of plant bioresources in Western Himalayan region of India - watershed based study.

机译：印度喜马拉雅西部地区植物生物资源的动态-基于分水岭的研究。

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The dynamics of plant bioresources including agriculture is different in the hills from those in the plains. The agriculture and forestry are the two major land use types and play an important role in providing food and livelihood security. The structure of vegetation for trees and shrubs layer was moderately instable and uneven as few species such as Acacia catechu, Lantana camara, Carissa spinarium in Mandhala; Quercus leucotrichophora, Pinus roxburghii, Myrsine africana in Moolbari, and Salix denticulata, Pinus wattichiana and Picea smithiana in Megad dominated the vegetation. Species richness was high at lower altitudes and low as we go higher. The distribution of species was mainly contiguous, however, few species showed random and regular distribution. Agricultural patterns have changed from traditional and subsistence to modern, which are primarily monoculture of high-valued cash crops. This has enhanced farm incomes but at the same time led to severe genetic erosion of traditional crops and varieties. Several development factors coupled with emerging climate change like erratic rain and snowfall patterns, flash floods, depletion of top soil and groundwater, destruction of natural habitat, wildlife menace, infestation of land through invasive alien weeds, low productivity, abandonment of agricultural lands have emerged as serious threats to the dynamics of hill agro-ecosystems.
机译：丘陵地区与平原的植物生物资源（包括农业）的动态是不同的。农业和林业是两种主要的土地利用类型，在提供粮食和生计安全方面发挥着重要作用。曼陀罗的相思树，马齿antLantana camara ， Carissa spinarium 等物种很少，树木和灌木层的植被结构中等不稳定且不均匀。 ; 白蚁栎（Quercus leucotrichophora）， roxburghii松（Pinus roxburghii）， Myrsine africana 和 Salix denticulata ， wattensis松木梅加德（Megad）的i>和史密斯木（Picea smithiana）占主导地位。物种丰富度在低海拔处较高，而在我们升高时较低。物种的分布主要是连续的，但是很少有物种表现出随机和规则的分布。农业模式已从传统和自给自足转变为现代，主要是高价值经济作物的单一种植。这增加了农场的收入，但同时导致传统农作物和品种的严重遗传侵蚀。几个发展因素与新出现的气候变化相结合，例如降雨和降雪模式不规律，山洪暴发，表层土壤和地下水枯竭，自然栖息地遭到破坏，野生生物威胁，外来入侵杂草侵害土地，生产力低下，农地被放弃对山地农业生态系统的动态构成严重威胁。

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