This indicates that the major restricting factor for soil fertility in this region is low soil pH and loss of exchangeable base anions.

因此土壤酸化并伴隨鹽基離子的淋失是限制研究區(qū)水稻土土壤肥力質(zhì)量的關(guān)鍵因素。

Based on the field surveys on a wide scale, the systematic studies were made on soil acid properties, particle fractions, exchangeable performances, saturated base, free feeric properties, clay chemical components, clay mineral types and their properties of genesis.

在大量野外調(diào)查的基礎(chǔ)上，系統(tǒng)地研究了土壤的酸性特征、顆粒組成亚洲国产精品自拍线路、交換性能、鹽基飽和度瑟瑟在线人体、鐵的游離度日韩中文在线精品字幕、粘粒化學(xué)組成及粘土礦物類型等發(fā)生學(xué)性質(zhì)欧美高清色色。

The horizontal spatial variation degree of soil available K美女AAAAAA一级毛片、available P and capacity of exchangeable base influenced much more by altitude,whereas soil pH value and clay particle content influenced less.

土壤速效K、速效P含量和陽離子代換量水平空間分異程度受海拔的影響較大国产最新自拍网，而土壤pH值和粘粒含量水平空間分異程度受海拔影響較小在线a亚洲看片。

Soils from the study sites show the typical characteristics of an Andisol, being strongly acidic, with fewer exchangeable cations, a low base saturation, and an accumulation of soil organic matter with Al-compounds which are recalcitrant to decomposition. Therefore, the effects of vegetation types on the contents of SOM, TC, TN, and CEC were not significant.

本試驗(yàn)區(qū)為典型的火山灰土壤，土壤呈極強(qiáng)酸性亚洲日韩精品A∨片无码毛片，可交換性陽離子濃度與鹽基飽和度極低欧美日韩国产综合一，加以腐植質(zhì)與活性鋁形成不易為微生物分解的復(fù)合物，造成大量有機(jī)質(zhì)聚積国产A∨爱情动作片免费观看，因此不同天然植被對土壤有機(jī)質(zhì)福利影院你懂的、碳氮濃度及CEC之影響均不顯著。

In the soils of orchards, the problems such as stronger acidity, higher mass fractions of readily available Fe, lower mass fractions of exchangeable base and deficient trace elements Cu, Zn were found, however, mass fractions of soil were optimum.

柑橘園土壤存在酸性過強(qiáng)亚洲老女人网、有效Fe含量較高、交換性鹽基含量嚴(yán)重偏低的問題视频,国产精品；土壤有機(jī)質(zhì)日本爆乳片手机在线播放，速效P，水解N含量適宜欧美真人一级99，而有效Cu羞羞网站在线观看入口免费，Zn含量缺乏。

The results were as follows:the mass fractions of the mineral nutrient elements in a part of the orchard plants were out of balance,especially the mass fractions of some trace elements such as B, Cu, Fe in the plants were higher; in the soilsof most orchards, the problems such as stronger acidity, higher mass fractions of readily available P, lowermass fractions of exchangeable base and lower mass fractions of available trace elements werefound.

結(jié)果表明欧美国产亚洲白丝一二三，部分果園植株礦質(zhì)營養(yǎng)元素質(zhì)量分?jǐn)?shù)存在失衡現(xiàn)象一级片免费黄色网站，尤其是植株的B、Cu77777青操网、Fe等微量元素質(zhì)量分?jǐn)?shù)偏高久久精品囯产AV。大多數(shù)果園土壤存在土壤酸性強(qiáng)91操视频、速效P質(zhì)量分?jǐn)?shù)高、交換性鹽基質(zhì)量分?jǐn)?shù)低的問題九九热最新网址，較多的果園土壤微量元素有效態(tài)質(zhì)量分?jǐn)?shù)偏低717午夜理论片在线观看影片。

The correlation coefficient between the fractal dimension of soil water-stable aggregates in Beibei Karst mountains and organic matter, total N, total K, total P, available N and P and K, total exchangeable base and pH are:-0.617,-0.532, 0.798〓, 0.450,-0.550, 0.724〓, 0.652〓,-0.489, 0.781 (〓: correlation is significant at the 0.01 level,〓: correlation is significant at the 0.05 level) respectively.

北碚巖溶山地表層土壤的水穩(wěn)性團(tuán)聚體分形維數(shù)與有機(jī)質(zhì)、全N国产精品亚洲第一区柳州莫青、全K日韩亚洲三级片电影,AV不卡、全P、速效N138福利导航、速效K真人操逼视频短片、速效P、交換性鹽基總量乡村妇女毛多水多下口、pH的相關(guān)系數(shù)分別為-0.617黃色A片三級三級三級久久免费、-0.532、0.798〓人人精品视频、0.450人人操人人干哺乳期巨乳大奶子、-0.550、0.724〓男人桶爽女人30分钟视频动态图、0.652〓最新av在线免费、-0.489、0.781（**：α=0.01水平顯著国产免费自拍；*：α=0.05水平顯著）：對26個(gè)樣地60個(gè)樣品的水穩(wěn)性團(tuán)聚體分形維數(shù)與養(yǎng)分指標(biāo)的相關(guān)分析表明国产首页在线视频，分維值與有機(jī)質(zhì)、速效N黄黄视频免费观看、全N的相關(guān)系數(shù)分別為-0.410免费一级毛片在线播放放视频、-0.452、-0.522欧美老妇人性爱网，達(dá)到顯著水平欧美国产日韩一区二区三区免费的在线视频。

Cold junction of the device was exchangeable, so there was no cross interference, and it was fit for concentration of trace components.

將冷端接受器設(shè)計(jì)為可更換結(jié)構(gòu)，所以無樣品交叉干擾在线日韩素人自拍网页观看视频，適用于痕量組分的富集亚洲精品综合玖玖爱在线。

Variations in form of exchangeable Cu,Cd and Pb and its bound to carbonate,iron and manganese and Organic matter in corn root were investigated by mean of the experiment of cultivation.

通過根際栽培試驗(yàn)，對玉米根際土壤中銅国产在线3p、鎘人人骚人人操人人高潮、鉛的形態(tài)變化進(jìn)行了研究。

Olympic Games, Jian Guanceng shown so far this year the city put out a few of the positive state of mind: to issue exchangeable bonds to ease pressure on non-small, slow pace of issuing new shares, Margin out the draft operations …… One week after another appearance.

奧運(yùn)會岛国欧美黄色网站视频，表現(xiàn)出監(jiān)管層今年到目前為止国产精品igao视频网网站，救市是積極的心態(tài)數(shù)：發(fā)行可轉(zhuǎn)換債券，以紓緩壓力的非小，發(fā)行新股一个人看的免费无码视频网站，保證金進(jìn)行緩慢草案業(yè)務(wù)……一個(gè)星期后性生活黄色网站，又出現(xiàn)。