查询词典 infertile soil

The classification of acidification indices about the tested the litchi orchard soil: the first class was soil intensity index of exchangeable aciditypH(KCl, exchangeable acidity, exchangeable aluminium, titratable acidity, actual acidification velocity , cation exchange capacity or electrical conductivity; the second class was soil exchangeable Ca2+, total base or base saturation percentage; The third class was soil intensity index of active aciditypH

采用第一类酸化指标，pH2.5的酸雨淋溶引起了供试土壤的酸化；采用第二类酸化指标，除pH2.5的酸雨淋溶引起了供试土壤的酸化外，pH3.5的酸雨淋溶引起了供试土壤的表层土壤酸化；采用第三类酸化指标，pH≤4.5酸雨淋溶引起了供试土壤不同程度的酸化。

On the other hand, fertilizer of CaHPCu is cheap and the high degree of purity (the content of P_2O_5 is 27 -30%)can improve phosphorus in soil, reduce production cost and promotes agricultural effectiveness. The content P in CaHPO_4 slow release in calcareous soil. Besides, the addition of HA activates phosphorus in CaHPO_4 and in soil, increases organics in soil, which promotes crops quality and yield.

一方面由于磷酸氢钙的纯度高，与过磷酸钙相比重金属等杂质含量较少，能有效减少对土壤及水体的污染；另一方面磷酸氢钙价格低廉，P_2O_5，含量可以达到27～30%，在石灰性土壤中本身就是一种缓效磷；腐植酸的添加，活化了磷酸氢钙中的枸溶磷，同时可能改善了土壤团粒结构，为作物优质、高产奠定了良好的基础。

At the same time, using their ability to absorb and give off water and nutrition, we can use them into the reform of soil, the plantation of vegetables and fruits, the forestation of gardens and non-soil cultivation, so that they have effects on preserving water, airing, keeping fertilizer, making soil loose for a long time, preventing soil from consolidating, keeping water moving, and something like that.

同时利用陶粒对水及养料的吸放性能，用于土壤改良、蔬果栽培、园林绿化和无土栽培中，可以起到保水、透气、保肥，长久保持土壤疏松、防止泥土板结及疏水性良好等效果。

Fertilizer type, rate of fertilizer application and the method change of spreading manure can influence the dynamic trends of component of inorganic phosphorus model in cotton field of gray desert soil, activate fixed attitude phosphorus in the soil, raise the content of the available phosphorus in the soil, and reduce the fixing of phosphorus in the soil.

9肥料类型、施肥量以及施肥方法的变化可以影响典型灰漠土棉田无机磷组分的动态，激活土壤中固定态磷，提高土壤有效磷的含量，减少土壤磷的固定。

The results indicate that:(1)Compare with the comparion, the soil physics character are improved after vegetation restortion , the soil unit weight in cyclobalanopsis glauca, Pinus elliottii, Robinia pseudoacacia , mixed forest and fire slash shrub separatly are 1.525g/cm~3, 1.426 g/cm~3, 1.625 g/cm~3, 1.482 g/cm~3, 1.423 g/cm~3. We can find the soil unit weight in other forest all bigger than the comparion (1.580 g/cm~3) except Robinia pseudoacacia .All these mean forest soil is looser and better capacity for aerated and dank.

结果表明：(1)植被恢复后林地土壤物理性质有良好的改进，青冈、湿地松、刺槐、混交林、火烧迹地灌丛容重分别为：1.525g/cm~3、1.426g/cm~3、1.625g/cm~3、1.482g/cm~3、1.423g/cm~3，除刺槐外其他林地均低于对照(1.580g/cm~3)，上述几种林分的孔隙度分别为：45.872%、51.956%、44.093%、50.485%、55.648%、47.228%，说明林地内土壤较对照更为疏松、通气透水能力更强，更有利于土壤微生物的活动，为研究区土壤肥力的提高奠定了基础。

With the increase of establishment years, most of plant communities on the grasslands showed a "V" type change trend in their quantities, i.e., high-low-high, hut the forbs biomass had a "Λ" type change trend and the sedge biomass increased gradually. Soil nutrients presented a "V" type hut soil hulk density presented a "Λ" type change trend, bile soil pH presented a decreasing trend. Most of soil microbial physiological groups and microbial biomass carbon showed a "V" type change trend, phosphorus-dissolving bacteria showed a "Λ" type change trend, denitrifying bacteria decreased gradually, while cellulose-decomposing bacteria showed an increasing trend.

结果表明：随着人工草地建植年限的增加，植物群落的数量特征多呈高－低－高、杂类草生物量低－高－底、莎草生物量增加的趋势；土壤养分变化为高－低－高、容重为低－高－底、pH呈下降趋势；土壤中多数微生物的数量及微生物生物量碳含量的变化为高－低－高，纤维素分解菌数量逐渐升高，而反硝化菌数量逐年下降，溶磷菌数量呈低－高－低的动态变化。

In this paper, we analysed the use present situation and the existng problems of land resources in Xin Yang region by a host of statistics, and expounded the essential causes of soil erosion, soil pollution, soil fertility drop,soil gleying and ploughland reduction and so on.

本文以大量的统计资料分析了信阳地区土地资源利用现状和存在的问题，阐明了引起本区水土流失，土壤肥力减退，低产田，土壤污染，土壤潜育化，耕地减少等问题的根本原因，针对这些问题，提出了一些对策。

Applied with test of potted plant and measurement absorbency for study physiological response of activity of cell defense enzymes and lipid peroxidation of slash pine's half-sib under water stress. There are 7 families comparison with general slash pine. The contents of superoxide dismutase, catalase, antioxidant, malondialdehyde and the rate of superoxide anion(-O2) generating are mensurated under normal water condition while soil water content is 70% and light water stress while soil water content is 55% to 60% and medium water stress while soil water content is 35% to 40% and heavy water stress while soil water content is 20% to 25%. The test result indicate that either water grads or families of contents of SOD,CAT,AsA,MDA are mighty notable difference. The rate of -O2 generating is notable difference within families. The rate of -O2 generating is mighty notable difference within water grades.

为研究湿地松优良半同胞家系保护酶及脂质过氧化作用对水分逆境的生理响应，采用盆栽试验和吸光度测定结合的方法，以普通湿地松种子为对照，测定了七个湿地松半同胞家系在正常水分状态（土壤相对含水量为70%）、弱度水分胁迫（土壤相对含水量为55%~60%）、中度水分胁迫（土壤相对含水量为35%~40%）和强度水分胁迫（土壤相对含水量为20%~25%）条件下的SOD、CAT、AsA、MDA的含量和-O2产生速率，研究结果表明：无论是不同水分梯度还是不同家系水平，SOD、CAT、AsA活性和MDA含量的差异均达极显著水平，不同家系水平间-O2产生速率有显著差异，不同水分梯度间-O2产生速率差异达极显著水平。

Fruticosa grown in clay sandy soil and clay soil was best, and they were significantly higher than that in other soils from 12th d in the test. The biomass of hypocotyls in 4 soils was similar, and that in forest soil was higher and its dry weight accumulated in hillside soil was more.

沙土和黏土中紫穗槐根的生物量最好，并在第12天的时候开始就明显高于其他土壤。4种土壤中的下胚轴生物量都差不多，以森林土的较高，而山坡土的积累的干重较多。

A good monitoring alternative is formulated in the garden for soil water and salt of the lower root zones, in which 85 soil profiles are orientated by taking into account of the typical statistic theory, range and isograms of soil water and salt of the lower soil root zone.

结合经典统计学和土壤水盐变程及空间分布图，选取并定位了85个土壤剖面监测塔中植物园下层根系的土壤水盐含量。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48