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In traditional agricultural production , farmers always fertilizes the land at their own will , which not only increased the cost of agriculture production and worsened the soil fertility , but also caused serious environmental pollution and threaten .

传统农业生产中,由于农民盲目施肥现象严重,这样不仅造成肥料利用率下降,也增加了农业生产的成本,使得耕地地力下降,而且也带来严重的环境污染,威胁农产品质量安全。

However, in the course of urbanization and industrialization, construction land is outspreading with rapid economic growth, which makes cultivated land face a dilemma that it is used in city construction or agriculture.

然而,在快速城市化和工业化进程中,随着都市经济持续快速发展,建设用地不断向外扩张,使都市快速成长区的耕地面临着严峻考验,即是为城市建设所用还是为农业所用的两难选择。

Seen from the present grain production and economic development, national grain is structurally overabounded and at the low security level, with regional security and insecurity in coexistence. Besides, cultivated land resources , water resources and farmers' economic income are all not optimized.

从我国粮食生产状况与经济发展水平看,全国粮食生产处于结构性过剩与低水平安全中,区域性粮食安全与不安全并存;耕地资源、水资源以及农民的经济收入状况等均不容乐观,加之自然灾害加重,粮食生产的环境成本将随之增加,这将影响我国未来粮食安全。

Among them, the collection of cultivated land, gardens, woodland, 15,000 yuan per mu of compensation, each in need of rehousing by land requisition of farmers 13,000 yuan for resettlement criteria, Young compensation fee is 1,000 yuan / mu.

其中,征收耕地、园林、林地,每亩补偿15000元,每一个需要安置的被征地农民的安置标准为13000元,青苗补偿费是1000元/亩。

If the land bank reserves, the development and construction of institutions of land is requisitioned cultivated land, and within two years there was no tender auction and listing should we withdraw?

如果土地银行储备的开发和建设机构的土地已征用耕地,并在两年内不存在招标拍卖和上市,我们应该撤销?

Experiments of bioremediation and control were conducted with the alkali meadow grass planted in saline soil for 3 years. Contrasted with control group, topsoil desalination rate was up to 77.00%; pH value decreased 0.25 pH unit; soil bulk density decreased 0.14 g/m^3; total porosity increased by 5.29%; soil aggregate structure increased by 23.14%; soil water content increased 70.30 g/kg; average triennial alkali grass yield was 36000 kg/hm^2. In addition, planting forage in saline soil as a medium and establishing a compound agro-forestry-animal system promoted the sound combination of planting industry, forestry, and livestock husbandry. Because of the reasons, utilization ratio of land reached more than 184.00%; the income of land increased from 16300 to 35500 yuan/hm^2 average income per farmer in the controlling region increased by 66.00%, from 2160.70 to 1300.80 yuan.

生物修复与调控试验研究表明,草甸盐土经种植碱茅草3a,耕层土壤与对照相比脱盐率达77.00%,pH值下降了0.25个单位,容重降低0.14g/立方公尺,总孔隙度增加5.29%,团粒结构增加了23.14%,自然含水量增加70.30g/kg.3年生碱茅草平均产草量36000 kg/hm^2;盐化耕地采用以种植牧草为中介,将种植业与农区林业、畜牧业有机结合成互相依存,互相促进的农林牧复合生物系统治理后,土地利用率可达184.00%以上,可获得16300~35500元/hm^2的经济收入,治理区农户人均纯收入由1300.80元增加到2160.70元,增加了66.00%。

In this paper, the author aimed at question on short days without frost and few agricultural acreage near cities and mustering human and animal force in North China, designed a three-dimensional planting mode on mixed cropping of corn and common bean and intercropped photo, flax and sequential cropped cabbage.

针对我省北方无霜期短,城镇附近农村人均耕地面积少,人、物力较集中的情况下设计出一种玉米混种菜豆角,间种马铃薯、亚麻,复种白菜的立体栽培模式。

The products can substitute solid clay bricks, avoid damage to the earth, curb the emission of CO2, and protect the environment and farmland. Other special characteristics include being light weight (about 1/3 of a double side plastering wall), having a thickness of 9 to 12 cm, having fire resistance and thermal insulation (A-level non-combustible insulation material), being convenient for construction (plate-type assembling and dry construction), and being cost effective (An enclosure wall of this material can reduce construction costs by 15% to 20%). It has advantages over solid clay bricks in terms of weight, energy-saving capacity, recycling and environmental protection.

产品不仅可以替代实心粘土砖,扭转烧砖毁地局面,遏制CO2的排放,保护环境和耕地,而且具有自重轻(约为双面抹灰墙的1/3)、墙体薄(厚9~12M)、防火与保温、施工便捷(采用板块式拼装、干式作业)、投资省(利用其作为建筑围护内外墙,可节省建筑投资10%~15%)等特点,在&轻质、节能、利废、环保&等方面均优于实心粘土砖。

Demand for grain to feed farm animals, as well as humans, keeps on climbing,then this rising demand for crops to produce bio-fuels as an alternative to oil.

接着便导致生物燃料农作物需求的上涨,因为其产生的燃料可以替代石油,但是这样也减少了粮食作物耕地。

Farmers in straw hats still plough the land with cows, plant seeds by hand and harvest stalks with sharp sickles.

戴着草帽的农民们仍然停留在用牛耕地,用手工播种以及用镰刀收割的原始生产方式上。

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