碱解氮

显著（P0.05）增加碱解氮、土壤速效磷和速效钾含量。

The contents of alkali-hydro nitrogen , rapidly-available phosphorus and rapidly-available potassium were increased significantly ( P0.05 ) .

4与最佳植茶区相比较，适宜区存在一些轻度限制因子，主要包括土壤pH，碱解氮、速效钾含量；

Compared with the first class , soil pH , available nitrogen and potassium were the slightly limited factors of the second class .

随着土层深度增加，pH值逐渐升高，全氮、有效磷、碱解氮等逐渐降低。短时间的矿区复垦土壤需要使用相应的肥料保证植物的正常生长。

With depth increasing , the pH value elevated gradually , total nitrogen , available phosphorus and alkaline hydrolysis nitrogen were declined gradually .

土壤原生动物与氮（主要是指氨态氮、碱解氮和硝态氮）有显著的相关性，说明土壤原生动物在土壤N的转化中起重要作用。

Result showed that there was significantly correlation between soil protozoa and soil nitrogen . Therefore , soil protozoan is important among the alteration of soil nitrogen .

土壤微生物量C、N、P与土壤酶活性在作物各生育期均表现为显著和极显著正相关关系，但与土壤碱解氮、有效磷的相关性受到施肥制度和作物生长的强烈影响。

Soil microbial biomass had a significantly positive correlation with soil enzyme activities , but its correlation with soil hydrolysable N and available P was strongly affected by crop growth and fertilization system .

定位观测表明，土壤有机质和碱解氮年递减量分别为1.11g／kg和1.68mg／kg。

Long term investigation result showed soil organic matter and available N content yearly decreased by 1.11 g / kg and 1.68 mg / kg , respectively .

试验表明：大部分处理能提高土壤的PH值、有机质含量、碱解氮及CEC、速效磷含量。

It showed : each treatment could improve the soil PH , organic matter , alkalized-nitrogen , CEC , rapidly available phosphorus .

对湛江地区辣椒地土壤取样，测定了容重pH、及有机质、全氮、碱解氮、速效磷、速效钾含量。

Soil sample from the chilli field was taken to determine its bulk density , pH and the organic matter , overall nitrogon , inorganic nitrogen , quick-acting phosphorus and potassium .

pH、有机质、碱解氮、速效钾、有效铁、铜、锌用指数模型拟合，变程介于216～733米。

PH , OM , AN , AK , Available Fe , Available Cu , Available Zn was fitting by exponential model , the range were 216 miters to 733 miters .

决策树和GIS图层叠置方法研究结果表明，土壤有机质始终占据决策树全部知识规则的第一次分支，起着重要的决定性作用，其次为速效磷和碱解氮；

The results based on decision-making tree and GIS overlay analysis show that the soil organic matter always holds the first place in all knowledge rules , P and N rank the second .

土壤pH、有机质、碱解氮、有效磷、速效钾和缓效钾的拟合理论模型均为指数模型。

The fitting theory model of the soil pH , the available nitrogen , soil available phosphorus , available potassium , slowly available potassium and the organic matter were the exponential model . 3 .

人工基质因有机质含量较高，故其碱解氮最大（106.9mgkg-1）。

Artificial substrate for the higher organic matter content , so the maximum nitrogen ( 106.9 mg kg-1 ) .

其影响因素主要有成土母质、粘土矿物组成、土壤阳离子交换量、pH值、有机质含量、碱解氮含量和土壤溶液中铵离子浓度等。

The soil factors affecting the capacity of fixing-ammonium in tested soils were mainly parent material , soil clay composition , pH , CEC , organic matter , available N and concentration of NH4 + in soil .

因此，反映草地生态系统退化较敏感的土壤理化指标有：土壤容重、总盐、pH值、全氮、碱解氮、有效磷、速效钾。

Therefore , the sensitive soil physical and chemical indicators to grassland ecosystem degradation are : soil bulk density , total salt , pH , total nitrogen , available nitrogen , available phosphorus and potassium . 2 .

土样风干贮存对碱解氮和Olsen-P含量的影响

Changes of Available Nitrogen and Olsen Phosphorus in Air-dried Soil Samples During Storage

在1：10万尺度下，利用土壤采样分析数据与DEM提取的海拔高度以及地统计学分析增城市水稻土土壤碱解氮的空间变异。

The spatial variety of soil available of paddy soil was analyzed by using soils sampled , geostatistics and altitude derived from DEM at the scale of1:100,000 in Zengcheng city .

结果表明：气体污染物引起附近林地土壤pH值、有机质、全氮、碱解氮含量下降，台湾相思林在污染环境下改良土壤化学性质极为明显。

Results showed that the polluted air caused the nearby forest decline of soil acidification , the content of soil organic matter , the total N and available N. The Acacia confusa stand could improve the soil chemical characteristics evidently .

采用主成分分析法和模糊聚类分析方法，构造了退化草地土壤质量评价的最小数据集为pH、碱解氮、容重、有效磷和总盐。

Using principal component analysis and cluster analysis method , the minimum data set for evaluating soil quality of grassland degradation was built at last , which includes bulk density , pH , available nitrogen , available phosphorus and the total salt .

从地统计半方差函数分析可以看出：pH、有机质、全氮和全磷具有高度的空间相关性；碱解氮、速效磷、速效钾和水溶态硼具有中等空间相关性。

Results concluded from semivariance analysis based on Geostatistics showed that : pH , organic matter , total nitrogen and total phosphorus had a highly spatial correlation ; available nitrogen , available phosphorus , available potassium and water-soluble boron had moderate spatial correlation .

不同利用方式下土壤比表面与土壤有机碳、全氮、碱解氮呈显著负相关关系，与土壤pH、硫、磷之间的关系因土地利用方式不同而具有一定的差异。

Soil SSA was negatively correlated with soil organic carbon , total nitrogen , and available nitrogen concentrations under the four land use patterns , however , the relationships between SSA and soil pH , sulfur and phosphorus were different among different land uses .

土壤碱解氮与孢子密度呈极显著负相关，土壤有机质与孢子密度呈显著负相关，土壤pH与菌丝定殖率呈显著负相关，与泡囊定殖率呈极显著负相关。

Soil alkali solution N had a significant negative effect on spore density , and soil organic matter presented negative correlation to spore density . Soil pH had a negative effect on hyphae percent colonization , and a significant negative effect on vesicle percent colonization .

7种苜蓿生长一年后土壤碱解氮含量变化很小，土壤的pH值，有机质，全氮量有不同程度的降低，但差异不显著。

The result also showed that the change of alkali hydrolysable N in the soil was little , and organic matter , pH value , and total nitrogen decreased with different degrees at the end of the year , but the decreases were not remarkable .

0～20cm土层休闲区和正常施肥区的土壤真菌数量与土壤含水量呈正相关，20～40cm土层中休闲区土壤真菌数量与碱解氮呈正相关；

Water content has direct relationship with soil fungus quantity in 0 ~ 20 cm soil layers of nonfarm soil and normal fertility soil .

其主要研究结果如下：1.设施番茄连作降低了设施土壤pH值，土壤容重，增加了土壤电导率，提高了土壤中有机质含量、碱解氮、速效磷和速效钾的含量。

The main research results as follows : 1 . The value of soil pH and soil bulk density decreased , and electrical conductivity , content of organic matter , available nitrogen , available phosphorus and available potassium in soil increased under continous cropping of protected tomato .

对剖面化学指标的方差分析显示，有机质、全氮、碱解氮、速效钾和CEC在剖面层次间均存在显著差异。

Variance analysis of the chemical indexes of profile suggests that organic matter , total nitrogen , alkali-hydrolysable nitrogen , rapidly available potassium and CEC are greatly different among layers of soil profile .

与第二次土壤普查相比较，部分土壤的pH有所下降；碱解氮、有效磷和速效钾的含量均上升，其中有效磷提高得最快，碱解氮升高得较慢。

Compared with the second soil survey , the decreased trend of soil pH was observed , the soil available nitrogen , available phosphorus and available potassium increased , while the increment of the available phosphorus was greatest , that of the available nitrogen was less . 2 .

土壤MWD、有机质和碱解氮含量、碱性磷酸酶和脲酶活性是影响植被演替的主要土壤质量因子。

Soil MWD , content of SOM , and alkaline N , alkaline phosphatase and urease activity were main soil quality factors , which strong affected the change of vegetation species .

有机质含量平均值达到28.9g／kg，碱解氮含量平均值达到153.9mg／kg，特别对烤烟区而言约有70%以上的土壤供氮能力处于较高至高的水平。

The mean of organic matter content could achieve to 28.9g/kg and nitrogen content of base leaching could achieve to 153.9mg/kg . Especially for drying tobacco area , the ability of supplying nitrogen of 70 % soil or more was in the level from high to higher .

相关分析表明，CPMI与土壤全氮、全磷、碱解氮、速效磷、速效钾、pH相关或极相关。

Correlation analysis indicated CPMI was not only related or extremely related to total N , total P , hydrolyzable N , readily available P , K and pH , but also sensitive to agricultural practices .

土壤全钾、速效钾处于中等或以上水平。0～20cm土壤中有机质、全氮、碱解氮显著高于20～40cm土壤。

Organic matter , total N and alkali-hydrolyzable N in soils with 0 ~ 20 cm depth were much higher than those with 20 ~ 40 cm depth .