过度放牧

The content of mineral elements in ripe fruits of M.sieversii from 78 seedings at Mohe Town,Gongliu Country were analyzed using Atomic Absorption Spectrophotometer.The results indicated that M.sieversii seedings presented considerable genetic variations in content of mineral elements with the range of variation coefficients from 24.2% to 54.0%.So it has large potential for further selection.Four elite seedlings were selected,namely large fruit type,high Ca content type,high Zn content type and high damascenone content.As the predominant component of Ily wild fruit tree forest,Malus sieversii had occupied an area of 9300ha.But the inherent reproduction system of M.sieversii and genetic diversity of the species were destructed in different degrees,as a result of farming assart,over grazing and damage by Agrilus mali.

上述结果支持"新疆野苹果可能是栽培苹果祖先种"的结论；②对巩留县莫舍乡的新疆野苹果78个实生株系果肉组织Ca、Mg、Fe、Zn、Cu、Mn6种矿质营养元素进行测定的结果表明，每种矿质元素含量单株间差异显著，变异系数在24.2％～54.0％，遗传多样性丰富，进一步选择的潜力很大；③根据新疆野苹果果实形态、香味物质和矿质元素含量等的测定结果，初步筛选出了大果型、高钙型、高锌型和大马酮型等4个特异性状单株；④调查发现，由于农田开垦、过度放牧以及苹果小吉丁虫的蔓延危害，目前伊犁野果林面积逐年减少，野苹果固有的繁育体系和遗传多样性受到不同程度的破坏。

We also found Gyps himalayensis, Tadorna ferruginea, Buteo hemilasius, Tringatotanus, Corvus corax and Prunella rubeculoides nearby the marshland.

但是过度放牧以及正在建设中的青藏铁路和公路可能会对湿地产生不良影响。

Our results do not stand for the argument that the invasion of Caragana microphylla is closely related to overgrazing.

另外，本实验的结果并不支持小叶锦鸡儿分布扩大和过度放牧密切相关这一观点。

"Disclimax:a climax community that has been disturbed by various influences, especially by human beings and domestic animals, such as a grassland community that has been altered to desert by overgrazing."

"人为顶极群落：受到多种力量侵扰的变极群落，尤其是人和家畜，如草原群落由于过度放牧而变成沙漠。"

But using marginal land for grazing is not as simple as it might sound. There is a risk of overgrazing.

利用边角土地作为草地不象听起来那么简单，也存在过度放牧的风险。

The negative component is a function of the additional overgrazing created by one more animal.

负面的影响是由这额外的一头牲畜所引起的过度放牧。

The influence of pasturing on the vegetation was also analyzed and is discussed.

同时就过度放牧对植被的影响进行了论述。

The misuse and destruction to the land, as well as the excessive feed aggravated the pressure to the grassland, resulted in severe degraded vegetation, accelerated the transformation from grassland to plowland, sandlot and unused-land, destructively impacted on the vulnerable ecology of the study-area.

人为对草地的滥用和破坏，以及过度放牧加重了对草地压力，使得植被严重退化，加速了向耕地、沙地和未利用地的转化，给当地脆弱的生态环境造成破坏性影响。

The content of mineral elements in ripe fruits of M.sieversii from 78 seedings at Mohe Town,Gongliu Country were analyzed using Atomic Absorption Spectrophotometer.The results indicated that M.sieversii seedings presented considerable genetic variations in content of mineral elements with the range of variation coefficients from 24.2% to 54.0%.So it has large potential for further selection.Four elite seedlings were selected,namely large fruit type,high Ca content type,high Zn content type and high damascenone content.As the predominant component of Ily wild fruit tree forest,Malus sieversii had occupied an area of 9300ha.But the inherent reproduction system of M.sieversii and genetic diversity of the species were destructed in different degrees,as a result of farming assart,over grazing and damage by Agrilus mali.

上述结果支持&新疆野苹果可能是栽培苹果祖先种&的结论；②对巩留县莫舍乡的新疆野苹果78个实生株系果肉组织Ca、Mg、Fe、Zn、Cu、Mn6种矿质营养元素进行测定的结果表明，每种矿质元素含量单株间差异显著，变异系数在24.2％～54.0％，遗传多样性丰富，进一步选择的潜力很大；③根据新疆野苹果果实形态、香味物质和矿质元素含量等的测定结果，初步筛选出了大果型、高钙型、高锌型和大马酮型等4个特异性状单株；④调查发现，由于农田开垦、过度放牧以及苹果小吉丁虫的蔓延危害，目前伊犁野果林面积逐年减少，野苹果固有的繁育体系和遗传多样性受到不同程度的破坏。

Statistics show that in our country of the causes of desertification of grassland, accounting for 25.4% blindly reclamation; overgrazing, accounting for 28.3%; excessive ch'iao mining accounted for 31.8 percent of grassland plants.

统计显示，在我国的缘故，草原荒漠化，占25.4 ％盲目开垦；过度放牧，占28.3 ％；过度樵采占百分之31.8的草原植物。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。