查询词典 turn up soil

Results showed that 1 soil structure in the rhizosphere was very high; water-holding capacity and organism count in the soil increased with altitude and duration of bamboo growth. However, soil etiolation and soil acidification was obvious. 2 Soil acidity was adjusted with lime; best applications were 10.625 thm^(-2) on the valley bottom, 14.811 thm^(-2) for the middle slope, and 12.558 thm^(-2) on the valley top.

结果显示：毛竹林根系活动层(60 cm)土壤结构较好，土壤水源涵养功能的大小和土壤的有机质质量分数随毛竹林成林时间和海拔高度的增加而增加；但土壤黄化、酸化特征较明显，土壤酸性调节主要以施用石灰为主，其中谷底毛竹林改造需石灰量为10.625 thm^(-2)，坡面的里白毛竹林为14.811 thm^(-2)，岗地毛竹林需石灰量为12.558 thm^(-2)；在氮磷钾3种元素中，氮素供应总体上良好，但要获得高产，氮肥的补充也是必需的。

Phase 1 started with field pea followed by spring wheat whereas phase 2 started with spring wheat followed by field pea.The objectives of this thesis are:1 to quantitatively analyze effects of soil chemical,physical and biological properties on soil quality and productivity under different tillage systems and the driving factors for the changes of soil quality under tillage in a long-term,2 to select the best soil quality assessment indicators,and 3 to establish soil quality assessment models that are suitable for the erodible environment of semi-arid region on the Loess Plateau.

通过分析3个轮作周期不同耕作方式下土壤理化性质、生物性质和生产力对土壤质量的影响，阐明长期耕作过程中土壤质量的演变特征及其驱动因子，筛选出适宜于黄土高原半干旱区侵蚀环境下土壤质量评价的代表性指标；并综合前人的研究，结合区域特点，建立适宜于黄土高原半干旱区侵蚀环境的土壤质量评价模型。

The ground of prepares ground of 1.1 cuttage nursery choice cuttage nursery before 1 cuttage should choose earthy and relief evenness, loose, source of water enough, illumination the loam of good, small acidity sandiness that does not have damage caused by a windstorm and freeze injury, control of height above sea level is under 700m, traffic compares convenient place. Cent of bedding of soil preparation of bedding of 1.2 soil preparation undertakes 2 times, first time is comprehensive soil preparation, soil preparation deepness amounts to 30cm above, combine bedding the 2nd times, 15cm of soil preparation deepness, etc of cleared block, fireweed is sundry, make land as far as possible fine.

其主要的技术要点如下。1扦插前的预备1.1扦插苗圃地的选择扦插苗圃地要选择地势平坦、土质疏松、水源充足、光照良好、没有风害和冻害的微酸性沙质壤土，海拔高度控制在700m以下，交通比较方便的地方。1.2整地作畦整地作畦分2次进行，第一次全面整地，整地深度达30cm以上，第二次结合作畦，整地深度15cm，并清除石块、杂草及其他杂物，尽量将土整细。

In the subtropical cropland soil, decompositionrate of organic carbon in paddy soil due to ground water is periodical water-logginghuangnitian＞gley huangnitian＞submerged huangnitian; decomposition rate of organiccarbon in dry land soil is vegetable soil in Nanjing＞red soil in Yujiang＞fluvo-aquic soilinYujiang.

亚热带农田土壤中，水稻土受地下水升降的影响，有机碳分解速率顺序：潴育黄泥田＞潜育黄泥田＞淹育黄泥田；旱地土壤有机碳分解速率曲线依次为：南京菜园土＞余江红壤＞余江潮土。

Results showed that the CO2 absorb ability in the eight Crop systems net productivity process was 4 032 366ta^(-1); the amount of CO2 outlet in the soil was 3981753ta^(-1), less than the CO2 adsorb ability, so that the whole crop system was a weaker carbon sink process in the atmosphere. The continue planting species such as Rice, sugarcane, cassava, and melon crop or high haulm crops have the characteristics of annually crop net productivity CO2 absorb ability bigger than soil CO2 outlet and this systems had bigger carbon sink function ability; the short haulm crop systems of peanut, soybean, flowers, and vegetable annually crops net productivity CO2 absorb ability less than soil CO2 out let, but also carbon sink source. The CO2 absorb ability of fruits and economic parts above ground bigger than that which growth under ground. Except of the CO2 absorb ability less than the soil CO2 outlet in the peanut during growth in procreate period, the other seven crops CO2 absorb ability were bigger than that soil CO2 outlet during procreate period. Most of crops during growth in procreate period had carbon sink function ability, and only in barren period showed the carbon source function phenomenon.

结果表明：2005年广州市8种农作物系统作物净生产力吸收CO2 4032366ta^(-1)，其土壤CO2排放3981753ta^(-1)，吸收大于排放，对大气CO2而言，整个农作物系统是一个弱的碳汇；水稻、甘蔗、木薯和果用瓜4种连作或高杆作物系统每年作物净生产力吸收CO2量大于土壤CO2的排放量，系统具有较大的碳汇功能，花生、大豆、花卉和蔬菜4种矮杆作物系统每年作物净生产力吸收CO2量小于土壤CO2的排放量，系统起着碳源作用；果实或经济产量生长在地上部分的作物其单位面积吸收CO2能力比果实生长在地下的作物大；除花生在生育期间生物量吸收CO2量少于同期土壤排放以外，其余7种作物在生育期间生物量吸收CO2的量大于同期土壤排放，大多数农作物在生育期间具有碳汇功能，在撂荒期才体现碳源作用。

Part I is soil dynamics including dynamic strength, deformation and pore pressure of soil, liquation of saturate sand, dynamic constitutive model of soil, dynamic response analysis of soil and dynamic stability analysis of soil.

包括土的动强度、动变形与动孔隙水压力，饱和砂土的振动液化，土的动力本构模型，土体的动力反应分析和土体动力稳定性的分析。

The results showed that in the four rehabilitated forests, the previous month's soil moisture content had stronger effects on the current month's soil moisture content in 0-40 cm and 20-40 cm layers, but had lesser effects on that in 0-10 cm layer. The soil moisture content in 20-40 cm layer was mainly affected by current month's precipitation, while that in 0-10 cm layer was mainly affected by current month's evaporation. The correlation coefficient between current month's precipitation and soil moisture content was the largest in pure Liquidambar formosana plantation, and the auto-interrelation coefficient of soil moisture content was larger in mixed forests than in pure L. formosana plantation.

结果表明：研究区各重建森林前一个月的土壤含水量对当月整个土壤剖面(0~40 cm)平均土壤含水量和当月20~40 cm土层土壤含水量具有较强影响，对当月0~10 cm土层土壤含水量的影响较小；研究区各重建森林20~40 cm土层土壤含水量主要受当月降水量的影响，0~10 cm土层土壤含水量主要受当月蒸发量的影响；在4种森林重建模式中，枫香纯林当月降水量与当月土壤含水量的相关系数最大，混交林模式土壤含水量的自相关系数大于纯林模式。

This showed that capacity of water-holding in biological soil crusts were obvious improve,and effected precipitation permeate or water second distribute process.The study results of"fertile islands"formation mechanism in biological crusts showed that biological crusts layer cover could increased nutrients content for below sand soil through precipitation permeate washing,and it promoted plants assimilate more nutriment.The matter import ways of biological soil crusts fertility island had many ways,including the effection of living macrobiotics metabolism in crusts levels,wind-sand flow of near surface,dust deposition and plants decomposition course,etc.Source of particle matter in biological soil crusts was wind-sand flow of near surface,and not dust deposition.Biological crusts layer cover had preserved effection for nature water content in 0-5cm soil layer,compared with the sand of no biological crusts layer,effecting precipitation permeate,and could not obvious restrained from the water evaporate process indoor experiment.

生物结皮层肥岛形成机制的研究结果表明：生物结皮层覆盖能够通过降水淋溶作用而增加下层土壤养分的含量，进而促进植物对养分的吸收；生物结皮层养分输入有结皮生物代谢、降尘、风沙流和植物分解矿化作用等多(来源：A73e3B3eC论文网www.abclunwen.com)种途径，但生物结皮层的颗粒物质来源主要是近地表风沙流，而不是大气降尘；生物结皮层覆盖对0-5cm土层自然含水量有一定的保护作用，并影响降水向深层渗透，不能有效的阻止表层水分的蒸发进程；研究表明采取人工促进技术能够在流动沙丘上形成生物结皮层，实现流动沙地的快速治理。

County soil parent material is limestone, sandstone, gneiss evolved over the three types of rock, soil can be divided into four categories, namely, mountain meadow soil, mountain brown, cinnamon, meadow soil, Cinnamon Is the backbone of the county soil.

全县土壤母质是由石灰岩、沙岩、片麻岩三类母岩演变而成的，可分为四个土类，即山地草甸土、山地棕壤、褐土、草甸土，褐土是全县的骨干土壤。

This paper makes the soil movement be four sections: a Cutting soil with edge; bThe soil movement along the plowshare and plow chest's below surface; c The soil movement along the plow cliff ;dThe soil movement beyond the plow in the course of farming in order to study the force of moldboard plow surface.

本文在研究犁体曲面受力时，把犁耕时土垡的运动分为四个阶段：a 用铧刃切开土垡；b 土垡沿犁铧和犁胸下部曲面运动；c 土垡沿犁壁运动；d 土壤超出犁壁曲面运动。

But this is impossible, as long as it is engaging in a market economy, there are risks in any operation.

但是，这是不可能的，只要是搞市场经济，是有风险的任何行动。

We're on the same wavelength.

我们是同道中人。