The company also actively developed plantation and pasturage, and founded a series of forestry farms and pasturages. Through this measure, a part of Gansu's forest had a reasonable business. To some extent, it promoted the pasturage level and met the needs of the people's life.

同時(shí)一级特黄看av片网址，公司還大力發(fā)展森林和畜牧事業(yè)，創(chuàng)辦了一系列的林場和牧場在线免费观看国产黄色A片高清，使得甘肅的部分森林得到了合理的經(jīng)營和保護(hù)国产在线不卡免费AV网站，一定程度上促進(jìn)了甘肅畜牧事業(yè)的發(fā)展，滿足了人民生活的需要最新亚洲亚黄色。

For some kinds of vegetables and pasturages, the contents of some heavy metals surpass the relevant quality standards, so when some crops were planted on the substrates, the uneatable species should be selected preferably and if some kinds of vegetables and pasturages must be adopted, the output could not be provided to mankind and also not be used in farming, in order to avoid harming peoples'health.5 The expediency evaluation model of pioneer plant on substrates was established and some plants were studied. The results show that the expediency evaluation of pioneer plants were respectively that clover was expedient to substrate 1, juniper, cotton and fescue were expedient to substrate 2 and juniper, annual bluegrass, fescue, cotton and clover were expedient to substrate 3.6 Some indexes to evaluate the capability of the phytoremediation on heavy metals and the comprehension about hyperaccumulator were put forward.

有多種植物的重金屬含量超過了相應(yīng)的國家標(biāo)準(zhǔn)99ri视频一区二区三区，因此在基質(zhì)上種植植物時(shí)，盡量選擇非食用性植物品種五月天六月缴情婷婷婷天天天，即使種植了蔬菜和牧草等植物亚洲第一视频网，也不應(yīng)將收獲后的產(chǎn)品供人類食用或用于畜牧生產(chǎn)，以免危害人體健康www.tzbeta.com。5建立和研究了復(fù)墾基質(zhì)先鋒植物的適宜性評(píng)價(jià)模型伊人久久综合精品永久图片，結(jié)果表明，不同基質(zhì)中適宜的先鋒植物分別如下：基質(zhì)1為苜蓿国产嫖妓一区精品视频，基質(zhì)2為檜柏av九一、棉花和高羊茅，基質(zhì)3為檜柏国产精品-色哟哟、早熟禾亚洲欧美中文日韩V日本、高羊茅、棉花和苜蓿欧美一级媱片^片久久精品。6探討了評(píng)價(jià)重金屬元素植物修復(fù)能力的指標(biāo)體系和&超富集植物&的概念大伊人一区在线视频。