In order to know the effects of mulch-drip irrigation on soil enzyme activities of saline-sodic soil with shallow water table, activities of alkaline phosphatase, urease, and invertase around the dripper, within 30 cm in horizontal direction and 40 cm in vertical direction from the dripper during the reclamation process, were investigated. Changes and distribution of soil enzyme activities, also their relationships with principal soil environment factors were studied.

為了解地下水淺埋區(qū)重度鹽堿地覆膜滴灌對土壤酶活性的影響AⅤ资源网影音先锋，測定了重度鹽堿地在滴灌利用過程中距離滴頭不同水平位置（0～30 cm）和垂直深度（0～40 cm）的土壤堿性磷酸酶18分钟处破之轻点好痛、脲酶和蔗糖酶活性国产第页，并對土壤酶活性的變化美国无码精品、空間分布特征及與土壤環(huán)境因子之間的相關(guān)關(guān)系進行分析色私拍97。

Microphylla plantations are obvious, such effects and the contents of soil organic matter, N, P and K are gradually increased with the growth of C. microphylla plantations. Moreover, the activities of phosphomonoesterase, saccharase, protease, urease, dehydrogenase, polyphenol oxidase and nitrate reductase and the contents of edaphon C, N and P are significantly increased at soil depth of 0~30 cm, especially at soil depth of 0~10 cm.

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Morphological and physiological identification showed that NTG-01 was Gram-negative, short rod shape, with flagella around the bacteria, V-P test positive and Methyl red test negative. The bacterium can use glucose as carbon suource and produce gases. No H2S produced on TTS medium. Lysine decarboxylase and orthinine decarboxylase, catalase and gelatine test are positive. Arginine decarboxylase, dehydrolase, oxidase and urase test are negative. Sequencing and alignment of 16S rDNA showed that it shared a 99% homologous sequence with Enterobacter aerogenes.

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Potassium, natrium determines it is good that use ion chooses electrode indirect method it is better also with indirect method to determine at calcium of direct way;, it is next occasionally phosphor of; of law of azotic arsenic Ⅲ determines use phosphor molybdic acid is ultraviolet law outcome is better it is better with result of law of personal candy kinase that; blood sugar determines; urea determines use Niao enzymatic ultraviolet anhydride of better; flesh uses rate law result enzymatic law outcome is better; albumin determines, it is vanadium acid next alkalescent phosphoric acid of oxidation law; is enzymatic determine outcome of fluid of use AMP amortize is better; amylase determines law of thing of enzymatic standard background and iodic colorimetric law coefficient of variation all bigger, former a bit small, latter of percent of pass is tallish, each lab can try to choose according to his condition.

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The total number of colony forming units of culturable bacteria and fungi were increased significantly(p.01 in transgenic sugarcane rhizosphere soil, but The total number of CFUs of culturable was not effected. No significantly higher CFUs of bacteria, fungi and actinomycetes resistant to kanamycinwere obtained in transgenic sugarcane soil.

結(jié)果表明：轉(zhuǎn)基因甘蔗顯著(p.05)降低了土壤脫氫酶的活性人妻系列精品影片无码专区，提高了土壤的纖維素酶韩国日本欧美三级一级爱国产、蛋白酶和脲酶活性(p.01)，而對蔗糖酶和磷酸單脂酶沒有影響www.999国产；轉(zhuǎn)基因甘蔗顯著增加了根際土壤可培養(yǎng)的細菌和真菌數(shù)量又粗又黄又爽视频免费看，但對放線菌影響很小。

The mount of germ and fungus quantity in soil are remarkably increased for the continuous cropping about 5 years, puts the trichobacteria quantity always change tendency to reduce;The edaphon total quantity, the bacterium quantity change reduces generally above the continuous cropping 5 years and below 5 years (including 5 years) the change are not obvious;In the nitrogen physiology group by ammoniates the bacterium primarily and the quantity changes are not very big;The nitrifying bacteria quantity is lower than the comparison (non- continuous cropping), the quantity of denitrifying bacteria is opposite;The alkalinity phosphatase, the urease, invertin activeness have a closed relations with the continuous cropping when it will increase less than 5 years or decrease in more than 5 years. The relation between catalase activeness and the continuous cropping is not very big. The reduction of the invertin activeness, the alkalinity phosphatase, urease activeness have slightly elevates, catalase activeness have no the regular changes.

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Therewas a significant characteristic of the vertical distribution of soil enzyme activity,the relationship analysis indicated that there was a significant positive relationshipbetween the catalase activity and OM,and total N,and effective P又大又粗又长又硬好爽国产、K,and ex-changible Mg,there was a negative relationship between the catalase activity andBase Situatiou percentage,and Total Contents of Base;the activity of the polyphe-nol oxidase was positively related with OM,and negatively related with total N andexchangible Ca clearly;The urease activity decreased with CPR increasing,and thechange of the former two kinds of soil enzyme actirity was not significantly withCPR increasing,It is possible to be related with maned disturbance frequently.

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The soil microorganisms quantities, microbial diversity index, microbial biomass carbon and the cellulose decomposition strength significantly reduced with increasing of heavy metal concentration, but the soil basal respiration rate were positively enhanced. The soil urease, alkaline phosphatase and polyphenol oxidase in the lead zinc mining area were sensitive. The invertase and catalase were not obvious inhibited to the heavy metals.

該礦區(qū)土壤微生物區(qū)系組成和微生物活性顯著不同于臨近非礦區(qū)土壤综合性爱欧美吧，隨著重金屬含量的增加2019A级毛片，土壤微生物數(shù)量、微生物多樣性指數(shù)A片综合网视频在线播放、微生物生物量碳以及纖維素分解強度均顯著降低一道本a级片，但土壤基礎(chǔ)呼吸卻明顯升高；土壤脲酶999久久久精品、堿性磷酸酶亚洲黑人欧美在线黄片、多酚氧化酶對鉛鋅礦較為敏感，而蔗糖酶和過氧化氫酶受到的抑制作用不明顯免费又黄又硬又大爽日本。

In order to investigate effects of bound residues of metsulfuron-methyl on the activities of soil enzymes, the activities of urease, acid phosphatase, catalase, and sucrase were determined in Huangfentuspiked with bound residues of metsulfuron-methyl for 98 days.

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Results showed that soil catalase activity was stimulated by the copper products and the inhibition of urease and sucrase activities by copper products were also observed,especially declined significantly in the treatment of BDM,the two enzymes activities in high ...

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