Saline soils and the rice paddy soils developed on saline soil.were sampled from Zhenlai county of Jilin Province in this paper.The main alkalize characteristic parameters,including pH,cation ex- change capacity,exchangeable Na~+,exchangeable sodium percentageand the content of wa- ter-soluble salty,were measured.

本文中的土樣采自吉林省鎮(zhèn)賚縣欧美亚洲另类图片，在鹽堿土的典型區(qū)域99思思视频，選擇了未開發(fā)利用的鹽堿土和在鹽堿土基礎(chǔ)上開發(fā)為稻田土壤的剖面，測(cè)定計(jì)算了土壤 pH 值99久久99久久精品免费看子伦、陽離子交換量美女视频黄a免费久久、交換性 Na~+、堿化度和水溶性鹽總量等主要堿化特征參數(shù)天天狠天天透天干天天怕∴。

Soil pH was in significant negative correlation with exchangeable acid and nonexchangeable acid, but in significant positive correlation with base saturation, which is mainly restrained by dominant exchangeable Ca(superscript 2+).

3土壤pH與交換性酸日韩在线观看黄A片免费视频、非交換性酸含量呈極顯著負(fù)相關(guān)，而與鹽基飽和度呈極顯著正相關(guān)亚洲國產綜合无码一区二区，且主要受占優(yōu)勢(shì)的交換性Ca制約豆奶app下载进入ios。

Items of pH, soil solution K, exchangeable k, nonexchangeable K and potassium fixation index were all determined after incubation. The results indicated similar extent and trends of transformation among three K forms, that is, decreasing content of soil solution K and exchangeable K but increasing nonexchangeable K level were observed in both CaCO3 and SrCO3 treatments of two soils. As to CaCl2.2H2O addition, pH increase was not found and the change of three K forms was not significant when application rate raised.

結(jié)果顯示CaCO3的添加，除能提升土壤pH值外亚洲中字乱伦一区二区，亦能使土壤中三種型態(tài)鉀(溶液性鉀亚洲欧美日韩一区二区在线，交換性鉀，非交換性鉀)有顯著的改變日韩系列在线精品视频观看，且改變程度及趨勢(shì)均甚為相似www黄片com，而CaCl2.2H2O的添加不會(huì)造成土壤pH的改變，且三種型態(tài)鉀并不隨CaCl2.2H2O用量的增加而有顯著改變的現(xiàn)象久久精品亚洲精品无码白。

The increased amount of non--exchangeable NH4^＋-N during the incubation indicated as the following tendency, namely, Eum-Orthic Anthrosols 〉 Los - Orthic Entisols 〉 Hap-Ustic Isohumisols 〉 Ust-Sandiic Entisols. Organic material influenced significantly the increased amount of non-exchangeable NH4^＋-N （P was 0.0002, 0.0004 and 0.0003 when incubated at 20 d, 50 d and 60 d, respectively）. NH4^＋-N increased remarkably when Stlpa bungeana and Medicago sativa were added compared with no addition. The contents of non-exchangeable NH4^＋-N increased significantly when added （NH4）2SO4 compared without addition at 20 d, 40 d and 60d of incubation and P was 0.0037, 0.0033 and 0.0027, respectively. It was the result that the NH4^＋-N from （NH4）2 SO4 was fixed within the soil. The increased amount of non-exchangeable NH4^＋-N increased significantly for different soils, on which different vegetation types grew before the collection of soil samples, when incubated at 20 d （P=0.0434）, but not significantly at 40 d and 60d （P=0.7378 and 0.5375）. The increased amount of non-exchangeable NH4^＋-N in the soil, on which crop straw and nitrogen fertilizer had been incorporated for a long-term period, was larger than that of no addition, but it was not significantly different among these two fertilization models. Soil clay, total N and organic matter were positively correlated remarkably with the contents of non-exchangeable NH4^＋-N, the increased amount of non-exchangeable NH4^＋-N had no correlation with soil clay, whereas it had significantly positive correlation with total N and organic matter.

培養(yǎng)期間非交換性NH4^＋-N的增加量均表現(xiàn)為以土墊旱耕人為土最大亚洲色图无玛一区二区在线观看，其次是黃土正常新成土，簡(jiǎn)育干潤(rùn)均腐土和干濕砂質(zhì)新成土較性谙吲访酪磺www.夜夜；添加有機(jī)物料極顯著影響培養(yǎng)期間的非交換性NH4^＋-N增加量（培養(yǎng)20d、40d和60d時(shí)P分別為0.0002一级a一级s爱片免免费免免高潮，0.004和0.0003）A级毛片免费无码真人，表現(xiàn)為紫花苜蓿和長(zhǎng)芒草土壤非交換性NH4^＋-N的增加量均極顯著高于不添加有機(jī)物料的對(duì)照土壤；在培養(yǎng)20d日韩免费在线视频、40d和60d時(shí)在线观看欧美，加（NH4）2SO4土樣非交換性NH4^＋-N的增加量顯著大于不加（NH4）2SO4土樣（戶分別為0.0037，0.0033和0.0027）亚洲一区二区三区在线观看视频，這是土壤對(duì)（NH4）2SO4中NH4^＋-N固定的必然結(jié)果日韩亚洲午夜在线影院；不同植被類型土壤培養(yǎng)20d時(shí)的非交換性NH4^＋-N增加量差異顯著（P=0.0434），培養(yǎng)40d和60d時(shí)差異不顯著（p分別為0.7378和0.5375）污污污午夜福利18禁；長(zhǎng)期秸稈和氮肥配施土壤非交換性NH4^＋-N增加量大于不施肥對(duì)照土壤黄色网站在线看国产免费，但差異不顯著土壤黏粒、全氮和有機(jī)質(zhì)與培養(yǎng)0d东京热精品、20d色网站性感污、40d和60d時(shí)土壤的非交換性NH4^＋-N含量均呈極顯著正相關(guān)；而非交換性NH4^＋-N的增加量與粘粒無相關(guān)性anjiuse在线观看，但與全氛和有機(jī)質(zhì)呈顯著正相關(guān)可以直接进入的黄色网站。

In Eucalyptus forestland, soil organic carbon, total nitrogen, available potassium contents and soil PH decreased significantly; soil available phosphorus and exchangeable magnesium contents, net nitrogen mineralization rate and ammonification rate also decreased but showed no significant difference. In shrubland, soil exchangeable calcium content increased significantly, but the contents of other nutrients had no significant change.

結(jié)果表明：火燒3年后，桉林土壤有機(jī)碳深夜看操B免费播放视频、全氮狼友免费在线观看视频、速效鉀和pH含量明顯降低，土壤有效磷男女狂干日本黑网、交換性鎂手机看片日韩精品视频在线看、土壤凈氮礦化速率和氨化速率降低，但不顯著AAA级黄色国产在线播放；火燒灌草坡除土壤交換性鈣明顯增加外一女三男A片视频，其他土壤養(yǎng)分均無顯著變化。

The results show that 42.86% topsoil samples are polluted by Cadmium, soil synthesis pollution index is moderate, Cadmium pollution degree of topsoil correlate with the environment of sampling sites. The results also show that exchangeable Cd, carbonate-bound Cd, organic-bound Cd and residual Cd are found in all soil samples except for Fe-Mn oxide-bound Cd. Furthermore, the concentration of exchangeable Cd and carbonate-bound Cd, both which have high biological validity, is high. Humus has a certain correlation with exchangeable Cd, organic-bound Cd and residual Cd, and has no obvious correlation with other chemical speciations. Any chemical speciation of Cd has no obvious correlation with pH and total Fe of soil samples. Cadmium in topsoil can be eluviated by acid solution, the quantity of Cadmium eluviated by redistilled water is little. With the rise of pH of eluviating solution, eluviated Cadmium quantity decrease. For the same soil sample, the lower pH value of eluviating solution is, the more fast the Cadmium is eluviated, and the more thequantity of Cadmium is eluviated.

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Soil potassium forms were gradated using the method of Jin Jiyun(1992),results showed: water soluble K亚洲人成色4444在线观看、exchangeable K隐私网占、non-exchangeable K、total K increased in the treatments of organic manure,and there were close relations between different potassium forms ,exchangeable Kwww.aiai2000.com、 Non-exchangeable K and mineral K might transform each another.

按金繼運(yùn)(1992)確定的方法對(duì)土壤鉀素形態(tài)進(jìn)行分級(jí)人人干人人模，結(jié)果表明：施有機(jī)肥能增加土壤水溶性鉀、交換性鉀色呦呦呦官网、非交換性鉀操B无码一级毛片、礦物鉀及全鉀含量。

And, the proportion of H(superscript +) in exchangeable acid showed a reverse trend. 2 Exchangeable bases, especially exchangeable Mg(superscript 2+), K(superscript +) and Na(superscript +), in various layers of the soils in the protected fields were much higher than those in the control, not only in content, but also in saturation, whereas soil exchangeable Ca(superscript 2+) did not vary much, but the base saturation and exchangeable Ca(superscript 2+) saturation decreased significantly.

2保護(hù)地各土層土壤交換性鹽基總量較露地相應(yīng)層次土壤均有所增加人成性视频欧美日韩，其中交換性Mg(上標(biāo) 2+)超碰人妻人人干、K、Na含量均高于露地做国产在线播放，而交換性Ca(上標(biāo) 2+)含量變化不明顯性生交A片；保護(hù)地各土層土壤交換性Mg(上標(biāo) 2+)、K女人被添全过程A片、Na飽和度較露地相應(yīng)層次土壤均有所增加一级毛片永久免费视频，但鹽基飽和度、交換性Ca(上標(biāo) 2+)飽和度下降明顯538在线无毒播放。

The classification of acidification indices about the tested the litchi orchard soil: the first class was soil intensity index of exchangeable aciditypH(KCl, exchangeable acidity, exchangeable aluminium, titratable acidity, actual acidification velocity , cation exchange capacity or electrical conductivity; the second class was soil exchangeable Ca2+, total base or base saturation percentage; The third class was soil intensity index of active aciditypH

采用第一類酸化指標(biāo)久久久久国产精品永久首页，pH2.5的酸雨淋溶引起了供試土壤的酸化；采用第二類酸化指標(biāo)亚洲欧美日韩精品一区二区三区熟女乱，除pH2.5的酸雨淋溶引起了供試土壤的酸化外日韩午夜短片在线观看，pH3.5的酸雨淋溶引起了供試土壤的表層土壤酸化；采用第三類酸化指標(biāo)国产免费A片区，pH≤4.5酸雨淋溶引起了供試土壤不同程度的酸化国产黄色一。

The results are:(1) The higher of altitude,the less of soil acidity in soil C horizon at Dinghushan;(2) There are more NH4-N,total K,available K, exchangeable K,exchangeable Na,exchangeable Mg and the content of exchangeable cations in lateritic red soil at low altitude than those in yellow soil at high altitude;(3) With increasing altitude,the contents of sio2 and Mn decrease,and the concentrations of this two minerals in lateritic red soil are higher than those in yellow soil.

結(jié)果為：（1）鼎湖山土壤剖面C層隨著海拔梯度的上升，土壤酸度降低91在黄色线视频。（2）鼎湖山位于海拔低的赤紅壤的NH4-N日韩中文激情无码迅雷下载，全鉀，速效鉀古代一级婬片A片AAA毛片中文，交換性Na美女裸体黄网站18禁无遮挡，交換性鉀，交換性Mg和陽離子含量比位于海拔高的黃壤的對(duì)應(yīng)養(yǎng)分含量要高www.日韩.com。