It is concluded that, first, geochemical data of the surface soils can clearly distinguish two kind of soils, that is, juvenile soils, for example, purple soils, which inherits most geochemical characteristics of the parent rocks or materials, and anthropic soils, the geochemical characteristics of which have been greatly changed as the results of intensive impact from variety of agricultural uses. Second, different soils have typical indicator elements association respectively due to different parent rocks or materials and utilization, such as purple soils, yellow soils (low alkali and alkaline-earth metal contents and pH value), paddy soils (high organic element and heavy metal elements contents) and fluvo-aquic soils (high rock-forming accessory mineral elements contents) and so on. Consequently, it can be suggested that elements association is an important indicator for two key factors (parent materials and anthropic activities) of soil classification. Third, some differences exist between soil genesic classification and result of cluster analysis, because geochemical characteristics of surface soils can not completely represent the foundation applying to soil genesic classification, that is, condition and process of soil-forming, and soil property.

結果表明：淺層土壤的地球化學數(shù)據(jù)能較好地用來區(qū)分兩類土壤欧美在线VAV，即紫色土一類的幼年土壤（在很大程度上繼承了母巖色色色婷、母質的地球化學特征）和受強烈人為活動水耕www.youjizz.com自拍、早耕熟化的土壤（外來物質的不斷加人顯著地改變了淺層土壤原有的地球化學性質）天天添天天干；(2)各類土壤因母巖母質和利用方式不同色色色色色色色色色色69快射视频，各具明顯的標志性元素組合特征特级大黄A片免费线观看网站，如紫色土、黃壤（低堿和堿土金屬元素和pH值）久久久精品久久久久、水稻土（高有機元素久久无码A片、肥料元素和重金屬元素）和潮土等，因此九九性爱，這些元素組合是土壤分類兩個要素的重要參照系在线不卡高清AV户外；(3)淺層土壤的地球化學特征不可能完整地體現(xiàn)成土條件、成土過程和土壤屬性這三個發(fā)生分類依據(jù)，因此大黄色视频，聚類分析結果與發(fā)生類型之間存在一定的差異中文字幕第二一区。

In August,there are obvious changes among different treatments under soil water stressconditions. Vs, and Vs/Va obviously raised while Va reduced, and tissue water contentalso changed. Comparing with that in July, water content of leaves in differenttreatments in August decreased by 18.06%, 2.57%, 4.82% and 9.94%, respectively.In August and September, diurnal average Tr under different treatments (light,medium, heavy and no soil water stress conditions ) are 80.90 mmolh_2Om~(-2)s~(-1)、76.37mmolh_2Om~(-2)s~(-1)玖玖色热在线、65.46 mmolh_2Om~(-2)s~(-1)91POPNY丨国产熟女、42.11 mmolh_2Om~(-2)s~(-1) and 40.60mmolh_2Om~(-2)s~(-1)、33.92 mmolh_2Om~(-2)s~(-1)欧州免费AV午夜福利、30.44 mmolh_2Om~(-2)s~(-1)日韩成人成色在线播放网站、23.29 mmolh_2Om~(-2)s~(-1),respectively. It shows that the Tr of Atriplex canescens leaves takes a tendency ofdeclining under long-term soil water stress conditions.

隨著土壤水分脅迫時間延長到8月份，各處理間相比發(fā)生了顯著變化欧美A片精品，其中Vs2020年精品黄色视频、Vs／Va顯著升高，Va的降低导航福利136，而組織含水量也發(fā)生了顯著的變化AV片在线观看网址大全；8月份各處理間(無土壤水分脅迫、輕度土壤水分脅迫白白发布国内在线视频、中度土壤水分脅迫和重度水分脅迫)與7月份相比葉片含水量分別降低了18.06％色色香蕉色色色、2.57％、4.82％国产av黄色片、9.94％欧美色爱区；在8月份和9月份輕度土壤水分脅迫、中度土壤水分脅迫最新欧美狂野日韩精品国产、重度土壤水分脅迫和無土壤水分脅迫的Tr的日均值分別為80.90 molh_2Om~(-2)s~(-1)天堂AV在线播放最新版、76.37mmolh_2Om~(-2)s~(-1)、65.46 mmolh_2Om~(-2)s~(-1)不卡av在线免费观看、42.11 mmolh_2Om~(-2)s~(-1)和40.60 molh_2Om~(-2)s~(-1)免费黄色在线啊～啊～、33.92 mmolh_2Om~(-2)s~(-1)、30.44 mmolh_2Om~(-2)s~(-1)欧美激情偷乱人伦小说专区、23.29 mmolh_2Om~(-2)s~(-1)国产妇女AAAAAAAA手机看片，說明四翅濱藜在長期的土壤水分脅迫脅迫下葉片的蒸騰速率呈現(xiàn)出下降的趨勢。

Under soil water stress conditions, the photosynthesis rate, water useefficiency and light compensation point of Atriplex canescens obviouslyreduced, and its dark respiration rate weakened. In the treatments in July, theaccumulative and average value of daily Pn from high to low is: light soil water stress＞no soil water stress＞medium soil water stress＞heavy soil water stress, the valueare 7.162μmolm~(-2)s~(-1)又污又黄又爽的网站、6.106μmolm~(-2)s~(-1)se视频在线观看、6.103μmolm~(-2)s~(-1) and 1.761μmolm~(-2)s~(-1), respectively. In the treatments in August, the accumulative and average value ofdaily Pn from high to low is: light soil water stress＞medium soil water stress＞heavy soil water stress＞no soil water stress, the value are 7.378μmolm~(-2)s~(-1)、4.738μmolm~(-2)s~(-1)人人妻人人干、1.794μmolm~(-2)s~(-1) and 1.705μmolm~(-2)s~(-1), respectively.

在土壤水分脅迫下四翅濱藜的凈光合速率亚洲综合久久综合激情久久、水分利用效率、和光補償點顯著降低性欧美老妇人牲交，暗呼吸速率減弱欧美性影片在线观看。7月份各處理Pn全天的累計值和平均值的大小順序為：輕度土壤水分脅迫＞無土壤水分脅迫＞中度土壤水分脅迫＞重度土壤水分脅迫yw在线，它們的值分別為：7.162μmolm~(-2)s~(-1)、6.106μmolm~(-2)s~(-1)91福利精选在线导航、6.103μmolm~(-2)s~(-1)和1.761μmolm~(-2)s~(-1)亚洲精品你懂的在线播放。8月份各處理的Pn全天累計值和平均值的大小順序為：輕度土壤水分脅迫＞中度土壤水分脅迫＞重度土壤水分脅迫＞無土壤水分脅迫，它們的值分別為：7.378μmolm~(-2)s~(-1)女生被操的喷水视频、4.738μmolm~(-2)s~(-1)免费观看黄色网站一区二区、1.794μmolm~(-2)s~(-1)和1.705μmolm~(-2)s~(-1)。9月份四翅濱藜的Pn變化趨勢于8月份的變化曲線基本相似亚洲成年不卡网址，唯一不同的變化就是各個處理的Pn比8月份的要高视色视色视频在线观看，這可能于9月份氣溫降低，濕度增大有關jizz女。

DPR of Atriplex canescens in differenttreatments are quite different, 2.87μmolm~(-2)s~(-1) under no soil water stress, 6.46μmolm~(-2)s~(-1) under light soil water stress, 6.06μmolm~(-2)s~(-1) under medium soil waterstress, 3.04μmolm~(-2)s~(-1) under heavy soil water stress. Comparing with the DPRunder light soil water stress, DPR decreased by 6.19% under medium soil waterstress, by 52.94% under heavy soil water stress and by 55.57% under no soil waterstress.

不同土壤水分脅迫下四翅濱藜的DRR表現(xiàn)出顯著的差異国模吧首页，無土壤水分脅迫下DRR為2.87μmolm~(-2)s~(-1)，輕度土壤水分脅迫的DRR為6.46μmolm~(-2)s~(-1)免费看污视频的网站，中度土壤水分脅迫的DRR為6.06μmolm~(-2)s~(-1)久久99久久久久久精品，重度土壤水分脅迫的DRR為3.04μmolm~(-2)s~(-1)，以輕度土壤水分脅迫為基礎中度土壤水分脅迫下降了6.19％久久精品大全、重度土壤水分脅迫下降了52.94％国产黑丝无码、無土壤水分脅迫下降了55.57％。

The soil had great population of bacteria, but the fungi quantity is excessive which may cause the multiplication of germina. As base-fertilizer, the slowed-release fatty had positive influence on soil fast-effect nutrient, but the organism quality is small, the soil enzyme activity with microorganism activity both low. Soil EC, total nitrogen, available nitrogen, available phosphorus and organic matters were significantly negative related to the soil pH. Soil total nitrogen was positive significantly related to soil available nutrient.

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By analyzing soil quality of 4 kinds of land use types in Kalamay agriculture development area according to principal component analysis, we draw the conclusions: nature shrub tree land is affected little by mankind, a great deal of organic matter return to soil every year, and root system can improve soil physical quality, can absorb salt from soil, so the soil quality of nature shrub tree land is the best; the soil quality of farmland is better than the soil quality of manpower Tamarix Bulrush land, which may be reasoned that man make for soil quality by irrigation to exclude salt and fertilizing organic muck in the earlier oasis digging up period. Soil physical qualities of tree land get harden and worsen for flooding irrigation, furthermore climate in Kalamay is dry and rainless , the other irrigation is very long time after the former one, so soil get harden severity and result soil physical quality get worse and worse.

利用主成分分析法分析新疆克拉瑪依農(nóng)業(yè)開發(fā)區(qū)四種土地利用方式下的土壤質量，得出：天然灌木林地国产精品视频男人的天堂，受人為影響較小色妞AV永久一区二区国产，每年有大量有機物質返還土壤，且天然灌木的根系可以很好的改良土壤的物理性質国产黃色A片视频1，同時所選天然灌木林灌木多是耐鹽堿并且本身又具有吸收積累來自土壤的鹽分好色网址，土壤質量最好；農(nóng)田受到的人為影響最大人人射97，但農(nóng)田綜合得分卻好于人工檉柳蘆葦?shù)鼐C合得分JIZZJIZZ亚洲日本少妇，這可能是由于在開墾初期的綠洲農(nóng)田538国产在线视频，受到了人們灌水壓鹽及增施各種有機無機肥料等有利于土壤質量提高的措施所致；喬木林地A级黄色网站免费看，由于人們用大水漫灌的方式灌溉99r在线观看视频精品，致使林地土壤變得板結，土壤物理性質下降国产视频精品91，加上克拉瑪依地區(qū)氣候干燥少雨亚洲欧洲第一区二区三区，一次灌溉后較長時間后才有下一次灌溉，致使土壤理化性質惡化无码国产精品一区二区gif，土壤質量不高5060网一级A片。

Chapter three is the degradation of Abamectin in soils. The results show:(1) The decomposition of Abamectin is fastest in Aquic Cambosols while slowest in Udic Cambosols in five kinds of different soils.(2) Organic matter content in soil is the most important factor which influences the degradation half-life of Abamectin in soil, and their relative coefficient arrives at 0.9323, but pH value, total nitrogen, CEC and field maximum moisture capacity correlate little.(3) Soil organic matter, soil temperature and pesticide concentration can obviously affect Abamectin degradation in soil, in addition, the degradation half-life of Abamectin in sterilized soil is far more than that in non-sterilized soil, which maybe contributes to microorganism in soil. Chapter four is the microbial degradation of Abamectin.

第三章研究了阿維菌素在土壤中的降解，結果表明：(1)五種不同類型土壤中深夜女人18毛片A级毛片免费，阿維菌素在潮濕雛形土中降解最快美国老人一级黄片视视，而在濕潤雛形土中降解最慢；(2)土壤有機質含量與阿維菌素半衰期相關性較強A片看片资源，相關系數(shù)為0.9323三上悠亚精品区在线看AV网站，而土壤酸堿度、總氮含量在线精品自拍第一页、陽離子交換量和田間最大持水量等因子與阿維菌素半衰期相關性較小极品萝在线永久视频欧美，說明影響阿維菌素在土壤中降解的最主要因子為有機質含量；(3)土壤有機質啪啪啪不卡视频、土壤溫度和農(nóng)藥濃度等因素對阿維菌素在土壤中的降解有較大影響精品一级片手机在线免费观看，此外滅菌條件下其降解半衰期遠大于未滅菌時的半衰期，這表明阿維菌素在土壤中的降解可能和土壤微生物有關国产毛片A片视频一区。

The result shows that when HPLC adopts 254 nm as scan wavelength, and the mixture of acetonitrile and water according to appropriate proportion as flowing phase, the parameters such as accuracy, repetition and precision et al for the method are all good to satisfy the essential rules of pesticide residue determination.Chapter three is the degradation of Abamectin in soils. The results show:(1) The decomposition of Abamectin is fastest in Aquic Cambosols while slowest in Udic Cambosols in five kinds of different soils.

第三章研究了阿維菌素在土壤中的降解粗大挺进尤物人妻中文字幕，結果表明：(1)五種不同類型土壤中，阿維菌素在潮濕雛形土中降解最快高清一区二区色视频，而在濕潤雛形土中降解最慢日本三级网站www中文字幕；(2)土壤有機質含量與阿維菌素半衰期相關性較強，相關系數(shù)為0.9323美女被插出白浆，而土壤酸堿度AV网站AV爱爱爱、總氮含量、陽離子交換量和田間最大持水量等因子與阿維菌素半衰期相關性較小人人色人人操人人射，說明影響阿維菌素在土壤中降解的最主要因子為有機質含量：(3)土壤有機質久久久久99精品免费、土壤溫度和農(nóng)藥濃度等因素對阿維菌素在土壤中的降解有較大影響，此外滅菌條件下其降解半衰期遠大于未滅菌時的半衰期性欧美另类，這表明阿維菌素在土壤中的降解可能和土壤微生物有關91久久精品一区二区三区。

Straw returned to field played a positive role in increasing soil insect communities with the largest contribution, primarily the amounts of individuals and dominant species of macro and meso/micro soil animal, especially Neanuridae and Isotomidae animals individual amounts increased by nearly 10 times.(3) Soil nutrien had a positive correlation with soil bacteria, azotobacter, ammonifying bacteria, cellulose decomposing bacteria and denitrifying bacteria. Straw returned to field could stimulate effective microorganisms growth and population quantity in the soil. The increase of microbe community amount is 15%~44% more than that of CK.(4) Soil nutrien had a positive correlation with soil phosphatase, urease and sucrase activities, and a negative correlation with catalase.

研究發(fā)現(xiàn)：(1)長期配施秸稈能提高土壤速效氮、磷亚洲天堂国产制服、鉀含量欧美一区二区激情，平均分別提高15%黄色网站点击进入、48%和22%；(2)配施秸稈對土壤昆蟲群落呈正向作用且貢獻最大日韩偷拍精品另类视频，主要增加了大型欧美性爱干、中小型農(nóng)田土壤動物的個體總數(shù)和優(yōu)勢類群數(shù)量，尤其是疣跳科和等節(jié)跳科動物個體數(shù)量增加近10倍不卡毛片日了日操了操；(3)土壤養(yǎng)分與土壤細菌超碰在线综合网、固氮菌、氨化細菌青春人人摸人人操人人干、纖維分解菌和反硝化細菌呈正相關99国产精品久久久久，秸稈還田激發(fā)土壤有益微生物的生長和類群數(shù)量，使土壤微生物類群數(shù)量比對照增加15%~44%美女高潮黄又色高清视频；(4)土壤養(yǎng)分與土壤磷酸酶五十路漂亮无码、脲酶、蔗糖酶活性呈正相關欧洲性生活视频，與過氧化氫酶呈負相關被cao的美女，秸稈還田增強土壤蔗糖酶、磷酸酶和脲酶活性五月丁香花综合网，特別是脲酶和蔗糖酶活性平均提高26.5%最新3D动漫H福利在线观看。

The results showed that the spatial distribution range of soil fertility in Qinling forest area on south slope was soil pH volue 5.97～6.89,organic matter 6.6～50.1 g·kg~-1, total N 0.5～3.8 g·kg~-1 ,available N 33.6～257.3 mg·kg~-1,available P 0.81～5.8 mg·kg~-1,available K 38.9～262.4 mg·kg~-1,clay particle content 11.3%～18.1%,capacity of exchangeable base 68.5～310.2 mmol·kg~-1 respectively; The spatial variation degree of available P, organic matter, and total N was big,whereas clay particle content and active acid pH value was small;the spatial variation degree of soil pH value, organic matter, available P, clay particle content, and capacity of exchangeable base decreased with the deep of soil,whereas soil total N、available N, and available K increased.

結果表明国内视频日韩精品视频在线播放，秦嶺南坡土壤肥力指標在整個土壤剖面空間分異范圍分別為：土壤pH值5.97～6.89久99久精品免费视频12，有機質含量6.6～50.1 g·kg-1，土壤全N含量0.5～3.8 g·kg-1偷拍一级黄色视频，堿解N含量33.6～257.3 mg·kg-1玖玖玖玖色在线观看播放，速效P含量0.81～5.8 mg·kg-1，速效K含量38.9～262.4 mg·kg-118禁网站在线播放，粘粒含量11.3%～18.1%αⅴ插插，陽離子代換量68.5～310.2 mmol·kg-1；其空間分異程度以速效P欧美精品视频第一区二区三区、有機質和土壤全N含量較大夜晚av网站，土壤粘粒含量和土壤pH值較小99久久99久久精品免费看子伦；隨著土層的加深美女视频黄a免费久久，土壤pH值、有機質18禁止爆乳无遮挡污污污网站、速效P、土壤粘粒含量和陽離子代換量空間分異程度減小www.好吊操，而土壤全N爱爱无码未删减、堿解N和速效K含量空間分異程度增大欧美精品一区。