查询词典 infertile soil

Aimed at the increasing eco-environmental problems, including water shortage, water pollution, soil salinization, water loss and soil erosion, loss of function of the channel and river, biocenose degradation, etc, which severely infected the sustainable development for irrigation area, the main works in this paper are summarized as followed: constituting the measures of water resources shortages for developing agricultural water-saving technologies and adjusting agricultural structures; constructing the water polluting control and purification system of Mushroom lake: source control and decrement-sewage collection and treatment - channel ecological interception - wetland treatment -reservoir purification; putting forward the systematic projects for soil salinization and water loss and soil erosion of the integrated application of water conservancy agriculture and forestry.; constructing the ecological impervious channel model in west bank, from all of which theoretical bases and technical support for the eco-environmental rehabilitant in Manasi irrigation area were offered. All of these works were based on data collection, technical analysis, on-the-spot investigation, experimental research and technical development about Manasi irrigation area, etc.

通过对玛纳斯河灌区进行资料查阅收集、理论分析、现场勘察、试验研究和技术开发等途径，针对玛纳斯河灌区存在的水资源短缺、水体污染、土壤盐渍化、水土流失、沟渠河道功能缺失、生物群落退化等日益突出的严重影响灌区可持续发展的生态环境问题，制定了发展农业节水技术、调整农业结构的灌区水资源短缺的措施，构建了&源头控制减量-污水收集处理-引水调控-渠道生态截留-湿地生态处理-库区生态净化&的蘑菇湖水污染控制与净化系统；提出水利、农业、林业综合应用的灌区土壤盐渍化、水土流失问题的综合治理方案；构建了西岸大渠生态防渗型渠系模式，为玛纳斯河灌区生态环境修复建设提供了理论基础和技术支持。

The results show that, at the upstream of the Kaidou River, soil salinization is very weak; at middle reaches of the river, salinization improvement was a success in some irrigated areas, salt in the soil is very little, but in non-irrigated area, far away from the river, the salt percentage in soil is still very high; at the lower reaches of the Kaidou River, soil salinization is strong and there is a trend that the salinization increases with depth.

结果表明，在开都河上游，土壤盐渍化程度普遍较轻；在中游地带，灌区内的土壤盐渍化改良取得了一定的成效，土壤中的含盐量较低，但是在远离河谷的非灌区，土壤含盐量依然很高；在下游及靠近博斯腾湖的地区，土壤含盐量普遍较高，并有随深度增加而增加的趋势。

Complicated ─ crushed stone soil, sandy soil and filling of light dense, soft plastic clay soil ～ fluid plastic clay soil, water table above the fundus elevation, not easy to unwatering

复杂──稍密以下碎石土、砂士和填土，软塑～流塑粘性土，地下水位在基底标高之上，且不易疏干

According to the mensuration and analysis of soil permit heaviness, soil moisture, soil maximum moisture, corn yield, the article researched the effects of subsoiling and no-tillage on soil physical characters and corn yield in second temperate zone of Heilongjiang province.

通过对土壤容重、土壤含水量、土壤田间持水量及产量的测定和分析，研究了深松免耕技术对黑龙江省第二积温带土壤物理性状及玉米产量的影响。

In general, with peat levels increasing, soil bulk density decrease and soil bulk porosity increased and so as soil organic matter and soil nitrogen, the peat also improved tobacco growth and leaf yield and quality.

总之，增施草炭能降低土壤容重，提高土壤孔隙度，增加土壤中有机质和氮含量，同时增施草炭能促进烟株生长，提高产量和改善品质。

Results show that the change trend of growth is homogeneous, but it plays a different role in the growth of seedling height, ground diameter and leaf number; that for seedling height, peat soil is the best and red loam comes the next, for ground diameter, red loam is the best and peat soil comes the next and for leaf number, peat soil is the best, and red loam with nutrient soil named "zhidele" comes the next; and that in a growth season, the law of monthly increment of seedling height and leaf number is "fast-slow-fast-slow-stop" while the monthly increment of ground diameter is relatively stable.

结果表明，4种不同基质条件下油茶生长量变化趋势基本保持一致，但对苗高、径粗、叶片数的生长影响不同，对于苗高来说，泥炭土最好，红壤土次之；对于径粗来说，以红壤土最好，泥炭土次之；对于叶片数来说，以泥炭土最好，红壤土和植得乐营养土次之。在生长期内，幼苗苗高和叶片数月增长呈现出&快－慢－快－慢－停止&的规律，而幼苗径粗增长量相对稳定。

Furthermore, transfer coefficient between total content and variable speciation including acid-soluble/exchangeable, reducible, oxidisable fraction of heavy metals are different. Transfer coefficient of total Cr is 0.65 in tailings area, but that of variable speciation is 0.26. In contrast with Cr,transfer coefficient of total Ni is 0.26, but that of variable speciation is 0.67. The similar characteristics on Pb and Zn in cultivated soil, namely, transfer coefficient of total Zn is high, but low for variable speciation, which is reversed for Pb. Transfer coefficient of total content and variable speciation in abandoned soil are low compared with above two fields soil, especially, variable speciation of Cu and Ni are not transported almost down soil profile.

重金属总量和活性态（包括弱酸提取态、可还原态、可氧化态）迁移率也表现出很大差异，尾矿区土壤Cr总量迁移率较高为0.65，而其活性态迁移率较低为0.26，Ni与Cr迁移特征完全相反，总量迁移率为0.26，而活性态迁移率为0.67；农田土壤中Pb总量迁移率低而活性态迁移率高，Ni与Zn特征相似，总量迁移率高而活性态迁移率相对较低；大棚地土壤中重金属迁移率均较低，Cu和Ni活性态几乎未发生向下迁移。

The mechanisms for the differences among rice cultivars in Cd uptake and translocation There were significant differences in root oxidating abilities and soil redox potential between two typical rice cultivars, Shan you 63 and Wu yun jing 7, that are greatly different in Cd uptake from soil. The root oxidating abilities and soil Eh were accordant with Cd uptake for the cultivars. The difference between the two cultivars in Fe concentrations of root iron plaque was also significant. The cultivar with higher Fe concentrations in root iron plaque absorbed less Cd from soil.

四、水稻不同品种对镉吸收及分配存在差异的生理机理对土壤中Cd吸收能力差异很大的水稻不同品种间，根系氧化力和土壤氧化还原电位有显著差异，品种的根系氧化力和土壤氧化还原电位与该品种对Cd的吸收能力间有很好的一致性；水稻不同品种间，根表铁氧化膜的含铁量有显著差异，根表铁氧化膜含铁量高的品种，对土壤中Cd的吸收能力低；盆栽水分腾发量高及根系伤流液Cd浓度高的品种，吸收积累Cd的能力强。

The upland yellow-red soil as case, the automatic classification techniques for soil type and soil organic matter map at county scale (1:50,000) were developed based on knowledge classification rules and expert classified simulator; The relationship between physico-chemical properties of coastal saline soils and their hyperspectral reflectance were studied; The multi-temporal RS data were used to detect the land use in coastal soil region; The spatial variability and sampling strategy for coastal saline soils were researched.

以滨海盐碱土为对象，在国内系统的开展了盐碱土理化特性和地面土壤高光谱之间的关系研究，并利用不同时相遥感资料进行盐碱土地区农业土地利用制图，研究了盐碱土不同剖面土壤空间变异特性和高效采样策略。

The time from saturated soil moisture content to wilting percentage of Aeolian sandy soil, Loessial soil and Lou soil was extended by 244.72%,251.11% and 36.31% respectively when Sodium Polyacrylate was applied at the suggested dosage.

风砂土、黄绵土与塿土的蒸发强度随着高分子化合物聚丙烯酸钠用量增加而降低，聚丙烯酸钠用量为0.5%时，砂土、黄绵土与塿土10天累积蒸发量分别较对照降低了59.89%、48.92%与55.81%；综合考虑对土壤蓄水与蒸发能力的影响，聚丙烯酸钠用量为风砂土、黄绵土应控制在0.08%～0.2%，塿土中用量必须严格控制在0.2%左右；在上述用量条件下，风砂土、黄绵土、塿土从饱和含水量蒸发失水至凋萎含水量的时间分别被延长了244.72%、251.11%与36.31%左右。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。