查询词典 infertile soil

The result of GPR investigation in west Jilin shows that the radar waveform of saline-alkali soil is different from that of tillable soil, and this can be used to distinguish tillable soil from saline-alkali soil. The extent of salinization can be determined according to the relativity of spectra.

吉林西部盐碱地区的探地雷达调查表明，盐碱地与耕地土的雷达回波具有明显差别，根据振幅的衰减特征可以精确区分耕地与盐碱地，根据频谱中高频峰值与土壤有机质含量的相关性可定性评价土壤的盐碱化程度。

The content of soil ulmin,and the entire nitrogen have slightly rise; compares to 20 years ago , the average content of soil effective phosphorus has slightly increased,but the condition that the soil lack of the phosphorus is still obviously;Athough the content of fast-acting potassium has slightly down,it still stand in a low level,so the soil can't satisfies the needs of the plant normal live.

土壤有机质、全氮含量略有上升；土壤有效磷平均含量比20年前略增加，但缺磷状况仍十分明显；速效钾含量略有下降，仍处于较低水平，不能满足作物正常生长的需要。

This paper,describes the RIC construction technology and its equipments,introduces construction process and compaction scheme,analyzes parameters of uncompacted fill soil and gravel-soil,compacted fill soil,and abutment backside soil,and reviews detection method.

文中阐述了RIC工法及其设备，介绍了RIC工法施工工艺流程及夯击方案，研究了RIC工法在松散填土和填石工程、补强夯实工程及结构物台背填土夯实工程施工中的施工技术参数控制，并综述了RIC工法的施工检测方法。

Over a 20-year period there was no increase in soil water content in the grazed grassland at depths of 2～9.9 m. There was a small increase(0.5～3.7 mm/a) in soil water content in the protected grassland, however the slow rate of increase suggests that at least 150 years would be needed for ungrazed grassland soils to regain water content similar to that present prior to planting trees. Recharge of deep soil moisture was faster in cropland(15 mm/a), but at this rate it would still take about 40 years to restore cropland soil water content to pre-plantation conditions.

结果表明，人工林死后的放牧荒坡在20a的时间里，其土壤水分没有补偿；人工林死后的保护草地土壤水分有微弱恢复迹象，但年恢复速度在0.5～3.7 mm之间，以这样的速度恢复到持续放牧荒坡的土壤含水量，至少需要150a以上；林后农地土壤含水量有恢复趋势，年平均恢复速度为15 mm左右，其土壤含水量要恢复到持续农地当前的水平，大约需要40a的时间。

Planted forests can deplete deep soil water, forming an obstacle to sustainable land use in the semi-arid area of Loess Plateau. The purpose of this study was to examine effects of grazing and cropping on replenishment of deep soil water where forest plantations had depleted soil moisture at depths of 2～9.9 m. We compared soil moisture on plantation plots with that on plots where plantations were replaced by crops, grazed grassland, and ungrazed grassland seperately.

为了研究黄土丘陵半干旱区人工林迹地土壤水分恢复情况，该文以正在生长的人工林土壤水分含量为人工林迹地土壤水分恢复的起点，并分别以持续农地和持续放牧荒坡的土壤含水量为林后农地和草地土壤水分恢复的上限，对位于黄土丘陵半干旱区绥德县境内的人工林迹地土壤水分恢复情况进行了研究。

In this paper,we use geostatistics to analyse special variability of soil salinity in Yanqi Basin of Xinjiang base on soil salinity data,and then we predict and draw the soil-salinity-class maps including unsampled region,it shows: the soil salinity data's Cv are not less than 100% and have very strong special variability;the spherical model f...

在焉耆盆地大规模的土壤取样、试验分析盐分数据的基础上，采用地统计学的方法对研究区的土壤盐分进行了空间特征变异分析，并采用普通克里格插值法制作出焉耆盆地的土壤盐分空间数字地图，结果表明：研究区各层土壤盐分变异系数均大于100%，具有强空间变异性；对土壤盐分进行半方差函数计算分析，发现拟合的理论模型均为球状模型，各层土壤盐分表现出强烈的空间相关性；土壤盐渍化程度在水平方向的分布与地形地势的关系密切，在垂直方向则表现出强烈的表聚特性。

Field survey, sampling and testing were used to discuss the characteristics of soil water content between different subsidence stages. The results show that after mining collapsing, the soil water content and soil water storage capacity of subsidence area is obviously less than the nature area, especially for the fissure zone. It is indicated that the collapsing fissures are extremely disadvantageous for soil water-holding capacity and the conditions of vegetational cover on the subsidence area also confirmed this result.

现以神府东胜煤田为研究背景，选择两个主要塌陷阶段分布区大柳塔矿区双沟村原农场和补连塔矿区原补连沟村作为研究区，采用野外勘查、取样测试与室内参数分析综合研究的方法，对采矿塌陷不同阶段表层包气带土壤水分进行对比分析，结果表明，采矿塌陷后，塌陷区尤其是塌陷裂缝区的土壤含水量与土壤储水量值均小于未塌陷区，说明塌陷裂缝对土壤的持水作用具有非常不利的影响，塌陷区与未塌陷区的地表植被覆盖情况也证实了这一点。

Growing sweet corn in summer could absorb redundant nutritional ingredients largely in the soil, but the number of fungi was high and the ratio of B/F is not obvious compared with CK. On the contrary, planting leafy vegetables had no obvious effect on the composing of soil microbe and the decruce of the number of pathogen of cucumber, although it could reduce the content of salty in the soil. The crop green manure of villose vetch could reduce the content of salty in the degree, but the sum of microbe in the soil reduced a little.

夏季休闲期间种植甜玉米可大量吸收土壤中多余的营养成分，但真菌数量偏高，B/F值与对照相比相差不大；种植速生叶菜虽然能降低土壤盐分含量，但对降低黄瓜致病菌数量和改善微生物区系组成方面无显著效果；豆科作物毛苕子在一定程度上降低了土壤盐分含量，但土壤微生物总量有所减少。

Results of eight investigations make use of the soil experience and analysis form the disaster area of 921 earthquakes, The result of soil investigation and analysis form the disaster area of 921 earthquakes, Understanding such as: 1. The recommand degree depth of drive stake is 40% of stake length for stake and wattling method on dry soil condition. And 58% of stake lengths on unsaturated condition. And 67% of stake length on soil saturated condition.

本研究乃以8个涵盖921集集地震灾区之区域地质样区，采取土样进行试验分析与计算，经研究调查结果得知，乾土时打桩编栅工法桩材的贯入深度建议为桩材长度之40%，半饱和时的桩的贯入深度建议为桩材长度之58%，完全饱和时桩贯入深度建议为桩材长度之67%。

In many cases, the effect of suction in a partially saturated soil is ignored at all; very often, the soil above the ground water table is simply treated as a dry soil or as a saturated soil.

现今处理部分饱和土壤之力学模型及地工相关问题，多仅描述其排水条件下之力学行为与工程问题，甚或更仅将土壤简化为饱和土壤来分析之。

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