查询词典 soil

Nitrate (NO3--N) showed a single hump-shaped curve with soil depth increased, but ammonia (NH4+-N) showed a parabola curve, with lowest value found in 20-40 cm soil layer and highest value in 0-20 cm and 40-60 cm soil layer.

油松林土壤全氮和有机质含量垂直变化趋势相似，随土壤深度的增加而降低；硝态氮(NO3--N)均随土壤深度的增加呈单峰曲线变化趋势，而铵态氮(NH4+-N)随土壤深度增加呈先降低后增加的抛物线趋势。

In order to find the soil nutrients limiting-factors of the Rice spike develop abnormality in Jianghuai Hilly Land ,the soil nutrients limiting factors in those areas were studied with a systematic approach technique on soil nutrient status through laboratory analysis,absorption study, pot experiment and using sorghum as indicator plant in Feidong,Changfeng and Yingshang in Anhui province.

为了摸清安徽省江淮丘陵地区水稻&颖壳不闭&土壤养分限制因子，采用土壤养分状况系统研究法，通过化学分析、吸附试验及盆栽试验，以高粱为指示作物，对安徽省江淮之间的肥东县、长丰县和颍上县水稻&颖壳不闭&土壤的养分限制因子进行系统研究。

The traditional approach to supplementing P for plants is to apply P fertilizer to the soil, but most of it may be readily immobilized or fixed by calcium ions in the lime soil or by iron and aluminum hydroxide in the acid soil, which results in a low use efficiency of P applied.

改善植物磷营养的传统方法是对土壤增施磷肥，但大部分磷肥被石灰性土壤中的钙和酸性土壤中的铁、铝氢氧化物固定成为无效态在土壤中积累起来。

The iron transformation , their effects on soil factors and iron availability of compound iron fertilizer (CF,self-made iron fertilizer) and sulphate iron(FeSO 4) in calcareous soil were investigated by using soil incubation method.

通过土培试验的方法，研究了复混铁肥、硫酸亚铁两种肥料在石灰性土壤中的形态转化、对土壤因子的调控作用及在有效性上的差异。

The isograms of soil saturated hydraulic conductivity and dry bulk density indicate that the change of soil saturated hydraulic conductivity does not only depend on soil dry bulk density, and has some relations with organic matter content, clay content and root distribution.

坡面土壤饱和导水率和干容重的等值线图表明，土壤饱和导水率的变化趋势并不仅仅取决于土壤干容重的相对大小，可能与有机质含量、黏粒含量以及根系分布情况等也有一定的关系。

The second method is allowed for complex geological conditions (inclined occurrence of the soil layers, the presence of karsts, frozen soil lenses, and so on) and is based on the use of more complex calculation schemes which also account for the inertia properties of the soil base.

第二种方法是让复杂的地质条件(倾向发生的土层中，在场的溶洞，冻土镜片，等)，以及基于使用更复杂的计算方案，其中还占惯性土壤性质的基地。

The results showed that different tillage patterns could improve soil water storage,the soil laer of no-tillage was covered by straws between 0 to 20 cm held water(4.542±0.894)×10~5 L/hm~2;Under no-tillage with full-straw mulching average soil temperature at 0～20 cm decreased...

结果表明：不同的保护性耕作措施均可提高土壤水分含量，其中留茬旋耕处理的土壤贮水量最高，达(4.542±0.894)×105L/hm2；在玉米播种前期及苗期，免耕覆盖处理降低土壤温度1~2℃，而整个生育期留茬旋耕处理与传统耕作处理的土壤温度相近；苗期，留茬旋耕处理的玉米株高、根长、鲜重和干重均优于其它处理，促进了玉米的生长发育；不同的保护性耕作措施均可提高玉米的产量，与传统耕作相比可增产

The results showed that different tillage patterns could improve soil water storage, the soil laer of no-tillage was covered by straws between 0 to 20cm held water (4.542±0.894)×10^5L/hm^2 Under no-tillage with full-straw mulching average soil temperature at 0~20cm decreased 1~2℃ during early corn growing period; In early season of corn growth, minimum-tillage with 1/3-straw mulching would promot the growth; Compared with the conventional tillage, economic yields could increase

结果表明：不同的保护性耕作措施均可提高土壤水分含量，其中留茬旋耕处理的土壤贮水量最高，达(4.542±0.894)×10^5L/hm^2；在玉米播种前期及苗期，免耕覆盖处理降低土壤温度1~2℃，而整个生育期留茬旋耕处理与传统耕作处理的土壤温度相近；苗期，留茬旋耕处理的玉米株高、根长、鲜重和干重均优于其它处理，促进了玉米的生长发育；不同的保护性耕作措施均可提高玉米的产量，与传统耕作相比可增产

Ag, Zn, Pb in dark brown soil in koraien pine and larch stands were analyzed, and the relationship between soil elements and forest site factors, such as elevation, slope, aspect, position, litter, soil depth and gravel content, were researched by the method of statistics analysis.

化学元素P、Ca、K、Mg、Mn、Cu、Ni、Ag、Zn和Pb的含量在红松、落叶松林下土壤中有显著差异，本文应用统计分析方法研究了这些化学元素与立地因子之间的关系。

The soil microorganisms quantities, microbial diversity index, microbial biomass carbon and the cellulose decomposition strength significantly reduced with increasing of heavy metal concentration, but the soil basal respiration rate were positively enhanced. The soil urease, alkaline phosphatase and polyphenol oxidase in the lead zinc mining area were sensitive. The invertase and catalase were not obvious inhibited to the heavy metals.

该矿区土壤微生物区系组成和微生物活性显著不同于临近非矿区土壤，随着重金属含量的增加，土壤微生物数量、微生物多样性指数、微生物生物量碳以及纤维素分解强度均显著降低，但土壤基础呼吸却明显升高；土壤脲酶、碱性磷酸酶、多酚氧化酶对铅锌矿较为敏感，而蔗糖酶和过氧化氢酶受到的抑制作用不明显。

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。