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Daxing as the case study has been studied in this dissertation, with the help of geostatistics and GIS, on the basis of data of the second general soil quality investigation in 1982 and the corresponding data of indoors soil analyzed, the spatio-temporal law of organic total-N, hydrolyzable nitrogen, available-P and available-K below the surface of soil (0-20cm) within 20 years in Daxing has been studied, as the same time, the change of soil quality has been evaluation applying to the method of soil quality compressive index, the main results are as follows

本文以北京市大兴区为研究样区，以相同样点的1982年第二次土壤普查土壤肥力数据和2000年的新采土样分析数据为基础，运用GIS与地统计学结合的方法，研究了20年来北京市大兴区300多点位的表层土壤的(0-20cm)有机质、全氮、碱解氮、速效磷、速效钾等肥力要素的时空变化规律，应用土壤质量综合指数法定量评价了表层土壤质量的变化，研究主要结论如下

The results indicated that vegetation biomass had a significant positive relationship with vegetation coverage. They had a significant negative correlation with bulk density of soil, and a positive correlation with macroaggregate, water stability macroaggregate, organic matter content, total nitrogen content, hydrolyzable nitrogen content, available kalium content, microbial biomass, and microbial respiration. However, they had no significant relationship with total phosphorus and available phosphorus.

在其恢复过程中，植被地上生物量与植被覆盖度呈正相关，它们与土壤容重呈负相关，而与土壤大团聚体、水稳性大团聚体、有机质含量、全氮含量、水解氮含量、速效钾含量、微生物量以及土壤呼吸强度之间呈正相关，与土壤全磷、速效磷含量无显著相关性。

Abnormity sampling method was adopted and there was 128 sampling points in this field.The statistical laws of soil pH,organic matter,total phosphorus,total nitrogen,alkaline hydrolyzable nitrogen,available potassium and available phosphorus were analyzed, and the results indicated that the variation coefficient of soil nutrients was between 6.3% and 356.1%,pH was 5.3%.Using the geostatistica...

以土壤的pH、有机质、全磷、全氮、碱解氮、速效钾和速效磷含量为研究对象，研究其相应的统计规律，结果表明土壤各养分属性的变异系数在6.3%~35.61%之间，pH为5.3%；采用地统计的半方差函数分析，发现有机质，全氮，碱解氮和速效钾在一定范围内存在空间相关性；采用克立格方法进行最优内插，绘制了养分含量分布图，并对其空间变异进行了初步分析。

In successional process of wetlands, bare land Suaeda salsa community, Tamarix chinensis community organic matter content decreased by 81.0%、67.4% and 59.5% separately compared to Imperata cylindrical community,total N decreased 61.1%,59.6%,41.2%,available N decreased 69.2%,60.1%、46.8%,available P decreased

在湿地演替过程中，光板地、翅碱蓬群落、柽柳群落有机质含量与白茅群落相比，降低了81.0%、67.4%、59.5%，全氮含量降低了61.1%，59.6%，41.2%。

However, even the interpolator is available; available intermediate signal points may not be exactly the desired ones where timing offset may exist.

然而，即使已经有了内插器，内插出的信号可能和正确的信号点，有些微的时序偏差。

The new ALS 306 is available now and a further member of this product family, the ALS 309, the modular labeler for 9 labels, will be available shortly.

新的ALS 306现已上市，进一步成员国的产品系列，肌萎缩侧索硬化309 ，模块化贴标机9 标签，将很快提供。

These include the 'Eatin Squig', a limbless blob which feeds on fungus, the 'Growler Squig', a legged variety used as a sheepdog for Gretchin (in third and fourth editions referred to as a 'Squighound' and available as an item of wargear), the 'Attack Squig' a powerfully voracious little beast available as an item of wargear, and the 'Face-eater Squig', a ferociously toothed variety used both as a weapon and for entries in face-eating contests The Ork and the Squig both open their mouths and bite, in a parody of a kiss.

&食用史古格&，一种无肢软体生物，以真菌为食；&嗥叫史古格&，长有腿，用作看守小鬼头的&牧羊犬&（在第三版和第四版规则书中成为&史古格猎犬&，作为战争装甲的一个部件）；&攻击史古格&，一种贪吃的小型野兽，作为战争装甲的一个强力部件；&吃脸史古格&，性情凶残，有牙齿，同时作为武器和&吃脸比赛&的选手。（Ork和史古格都张开嘴对咬，貌似对接吻的拙劣模仿。

With these databases,12 essential evaluation factors was decided,such as drainage capability,crop rotation system,parent material,soil erosion type,soil acidity,organic matter,total nitrogen,available phosphorus,available potassium,exchangeable magnes...

并在此基础上选取排涝能力、轮作制度、成土母质、土壤侵蚀类型、pH、有机质、全氮、有效磷、速效钾、交换性镁、耕层厚度、障碍层状况12个要素作为评价指标。

I planted seeds of the Nierembergia variety "Blue Mountain" that is available from Park Seed Co. Seeds of the "White Robe" and "Purple Robe" varieties are available from Stokes Seeds.

我种的种子在Nierembergia品种&蓝山&，也就是可以从公园种子有限公司种子的&白色长袍&和&紫色长袍&品种可从斯托克斯种子。

The results calculated by the Elovich rate equation showed that K release rates from 1 mol.L-1 HNO3 extraction ＞those from 2 mol.L-1 HNO3 extraction ＞those from H-resin extraction. Elovich equations combining with the data of H-resin and 2 mol.L-1 HNO3 successive extraction could well described the release characteristics of soil K. The correlation coefficients of the equations reached most significant levels (r＝0.956**—0.999**), and standard errors of specific K release capacities between the vaules calculated by the equations and those measured by both successive extractions were smaller(s=1.61 and 3.52). The specific release rates of soil K calculated by the Elovich rate equations were significantly correlated with the indices of soil K availability (the amounts of easily available K, nonexchangeable K, total available K in soils and K absorbed by ryegrass).

研究结果表明：1 mol.L-1 HNO3提取法的释K速率＞2 mol.L-1 HNO3提取法的释K速率＞氢饱和交换树脂提取法的释K速率；氢质交换树脂和2 mol.L-1 HNO3提取法结合Elovich模型较理想地描述了土壤K素的释放特性，拟合方程的相关系数均达极显著水平(r＝0.956**-0.999**)，土壤特征累积释K量的计算值与实测值的标准差较小(s=1.61和3.52)，且通过速率方程计算的土壤特征释K速率与K素有效性指标(速效K、缓效 K、有效K及黑麦草总吸K量)的相关性也较为密切。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。