有效磷

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 .

测定普钙中有效磷的EDTA一步萃取法

Determination of Available Phosphorus in Ordinary Calcium Superphosphate with EDTA One-step Extraction Method

石灰性土壤有效磷库的~（32）P同位素动力学标定

￣( 32 ) P Kinetic Characterization of Phosphorus Pools of Some Calcareous Soils

在室内条件下研究了施肥措施对土壤微生物总量、溶磷细菌、土壤有机碳的影响，同时比较了溶磷细菌与有机碳、有效磷、微生物C和硝态氮的相关性。

The effect of long-term fertilization on soil microflora , number of inorganic phosphate solubilizing bacteria and organic carbon were studied .

土壤中有效磷含量为388mgkg-1，pH为9.21。

The available phosphorous content was 388 mg kg-1 in soil with pH 9.21 .

结果表明，施用柠檬酸明显降低了土壤pH，增加了土壤中的有效磷的含量；

The pot experiment showed that applying citric acid could remarkably reduce soil pH , and increased the contents of available phosphorus in calcareous soils ;

其余土壤养分指标：有效磷、有机质、全氮、硝态氮和土壤pH总体来看，相对于对照样地土壤无较大影响。

Other indicators of soil nutrients : phosphorus , organic matter , total nitrogen , nitrate and soil pH had no great impact in general , professedly .

添加EDTA及黄腐酸对水稻土中有效磷浓度的影响

Effect of EDTA , fulvic acid and iron oxides on available phosphate concentration in paddy soils

有机质的理论模型是球状模型，全氮、有效磷是指数模型，pH值、速效钾是线性模型。

The optimal model of organic matter was the spherical model ; total nitrogen and phosphorus were the index model , pH , potassium were the linear model .

该湖泊底泥生物有效磷（BAP）平均为138.53mg。

Biologically available phosphorus ( B AP ) averaged 138.53 mg .

结果表明，连续施用猪粪，土壤pH值降低，有机质、全氮、全磷和有效磷增加。

It would be gained that pH of the soil decreased , and the content of TN , TP , OM and bio - available phosphorus in soil increased .

滴灌条件下根围润湿区土壤可以经常保持较高的含水量，pH高于根外非润湿区和畦灌区，其土壤有效磷的含量高，而土壤有效铁的含量较低。

Soil available P , water content and pH value are higher in wet part soil of drip irrigation than that in non-wet part and in furrow irrigation plot .

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 .

统计分析表明，在土壤理化性质中，土壤毛管孔隙率、非毛管孔隙率、有效磷含量、全磷含量、含水率和PH起着主要作用。

Among the physical and chemical soil properties , capillary porosity , non-capillary porosity , available P , total P , water content and PH value played an important roles .

添加EDTA和黄腐酸可使土壤有效磷有大幅度的增加。由于EDTA和黄腐酸对氧化铁的络合及溶解作用，促进了土壤中微生物铁还原过程，导致土壤有效磷浓度的增加。

EDTA and fulvic acid may increase available phosphate concentration by advanced the reduction of iron oxides in paddy slurries .

用ASI法测定中、酸性土壤有效磷结果比较

Studies on ASI method of determination of available soil phosphorus in neutral and acidic soils

Ca8-P对土壤有效磷库起重要调节作用，AI-P在供磷上也有一定意义。

Ca_8-P plays an important role in regulating the supply of soil available phosphate .

施入的磷肥有70～80%残留于土壤，极大地丰富了土壤有效磷库，平均每年增加2.8mg／kg。

The residual P in soil accounted for 70-80 % of applied P fertilizers , which increased soil available P content in a average rate of 2.8 mg / kg annually .

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 .

其中P含量的变动与籽棉产量呈负相关，这可能与供试土壤有效磷含量特高（79.5ppm），引起元素之间比例失调有关。

It was found that plant P concent shows a negative corelation to raw cotton yield . This might be due to the too high concentration of soil available P ( 79.5 ppm ) which made the soil nutrients unbalanced .

底泥有效磷（Olsen-P）平均为9.76mg。

Sediment available phosphorus ( Olsen extracted P ) averaged 9.76 mg .

3种植物群落下有效磷较裸露尾矿没有显著增加。植物的定居显著提高了尾矿中过氧化氢酶、芳基硫脂酶和脲酶的活性（P0.05）；

The establishment of plant communities also increased the catalase , arylsulfatase and urase activities of the tailings significantly ( P0.05 ), but the activities of acid phosphomonoesterase and dehydrogenase did not increased significantly .

4稻区高水平磷肥投入促进了土壤富磷化，土壤OlsenP积累的同时，相应地提高了土壤生物性有效磷、水浸提磷，并提高了土壤磷素的流失潜能。

High P input has resulted in soil P accumulation . Higher soil Olsen P contributed its bio available P , water extracted P and increased soil P loss potential .

结果表明，培养1d时，不同氮肥对土壤有效磷含量无显著影响，但显著降低土壤的水溶性磷含量；

The results showed that all nitrogen fertilizers hardly influenced soil available phosphorus on the first day incubation , while greatly reduced soil solution phosphorus .

有效磷含量与pH值呈明显负相关，表明pH值下降导致闭蓄态磷活化，促进了2a苗木的生长。

Differed from 1 a seedlings , the decrease of pH activated the occluded phosphorus and led to the increase of AP , which was good for the growth of the 2 a seedlings .

研究内容及主要结果如下：1研究得知，该污灌区土壤为中性土壤，pH值在6.58-7.48，污灌区土壤有机质含量在10.62-34.2，污灌区全氮含量在0.009657-0.020444，污灌区有效磷含量在0.36-0.78。

The main results are as follows : 1 The soil in sewage irrigation area is neutral . pH values is 6.58-7.48 , organic matter content is 10.62-34.2 , total nitrogen content is 0.009657-0.020444 , available phosphorus content is 0.36-0.78 .

单位体重的脱脂干股骨重及其中灰分、钙、磷含量随着饲粮有效磷水平升高而显著升高（P＜0.05）；

Dry fat-free femur weight per kilogram bodyweight ( P < 0.05 ), the calcium ( P < 0.01 ), phosphorus ( P < 0.01 ) and ash ( P > 0.05 ) contents in dry fat-free femur , all raised with increasing dietary AP levels .

在6种环境因素中，除了土壤pH值以外，土壤温度、含水量、活性有机质、水解氮、有效磷对土壤微生物、微生物呼吸速率、小型动物和生化作用存在着不同程度的影响。

In 6 environmental factors , the soil temperature , water content , hydrolytic nitrogen , effective phosphorus and active organic matter , except pH , affected soil microorganism , mini-animals , microbial respiration rate and biochemical effects in different degree .

研究建立了荆州市耕地地力评价指标体系，选取了有机质、有效磷、速效钾、有效锌、质地、pH、剖面构型、地貌类型、成土母质、灌溉保证率和排涝能力11项指标。

The system have 11 indicators , including the organic matter , phosphorus , potassium , zinc and effective , texture , pH , profile configuration , landform type , soil parent materials , guaranteed rate of irrigation and drainage capacity .

研究结果如下：（1）不同母质紫色土的基本性质和养分含量分析表明，供试土壤的pH、有机质、有效磷、S、Mg、Mn和Cu均存在显著性差异。

The results were as follows : ( 1 ) The value of pH , the content of organic matter , effective phosphorus , effective sulfur , Mg and Cu were significant different among the three purple parent soils .