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We investigated the effect of combined application of maize straw, bean haulm, wheat straw and weathered coal on the activity of alkaline phosphate enzyme in calcareous cinnamon soil by means of regression design of 416A-optimization.

本研究采用四因数二次回归 4 1 6A—最优设计方法,通过裸土盆栽试验,在施用少量N、P肥的基础上,研究了玉米秆、豆秆、麦秆和风化煤四种有机物料配合施用对石灰性褐土中碱性磷酸酶活性的影响,建立了上述四个因子与土壤碱性磷酸酶活性之间的数学模型,并分别进行了试验因子的主效应和互作效应的分析

In order to evaluate the restoration effect of cropping systems on continuous cropping soil, treatments of nitrogen-catching crop, rotation, and intercrop were adapted to study soil fertility and microbial indexes of the soil from an 8-year continuous cropping field using pot experiments. Fallow was used as a control. Cucumber yield were recorded.

为了评价栽培制度对连作障碍土壤的修复效果,采用盆栽方式,设置休闲、轮作、间作等处理,以生产中常用的栽培制度即夏季休闲的连作制度为对照,研究各处理对连作8年黄瓜的温室土壤生物修复效果及对后茬黄瓜产量的影响。

The hot metalic plate in the hotpot is too large relative to the size of the hotpot; the gap between the plate and the edge of pot is so narrow that it is quite inconvenient to drop and take the food into and from the hotpot.

炎热的金属板,在火锅过大,相对的大小对火锅;之间的差距板块和边缘的盆栽是如此狭窄,这是相当不方便的下降,并采取食物转化和从火锅。

The result indicated that after 15d the structure of straw was destroyed and did not float longer, which did not affect crop"s rootage; furthermore the effect on the next crop"s growth was studied, and the results shown that the microbial agent could accelerate the next crops growth. The strain B3 secreted incretion IAA and ABA by TLC and immunological analysis.

通过盆栽试验和扫描电镜观察检测了秸秆降解剂对秸秆的降解效果,结果发现,该降解剂在15d内就能破坏秸秆的结构,使秸秆不再漂浮,不影响作物的生根;进一步检测其对后季作物生长的影响发现,该降解剂还能促进后季作物的生长,薄板层析和免疫学检测均显示菌株B3分泌了IAA和ABA。

To evaluate the potential of several biodiesels, which had different content of fatty acid methyl ester, as substitute solvent for quizalofop-p-ethyl emulsifiable concentrate, the type and content of fatty acid methyl esters in tested biodiesels were analyzed by gas chromatography, and 5% quizalofop-p-ethyl ECs were prepared with different biodiesels, respectively. The control test against gramineous weeds by the 5% quizalofop-p-ethyl ECs were carried out in greenhouse.

为评价不同来源生物柴油作为溶剂配制精喹禾灵乳油的效果,采用气相色谱法测定了几种生物柴油中脂肪酸甲酯的种类及含量,利用相应制备的5%精喹禾灵乳油进行了防治禾本科杂草的盆栽试验,同时比较了不同生物柴油对药剂稀释液表面张力、干燥时间和在叶片表面沉积量等药液物理性状的影响。

It is involved in many aspects of organic matter decomposition, partial regulation of microbial activities, nutrient cycles and crumbly structure. Depending on their diet (saprophagous, phytophagous or predation), soil fauna is closely linked both to each other and to microorganisms, plants and soil.

本论文试图以土壤动物作为生物指标来评价土壤重金属污染,通过对重金属污染区(以浙江省富阳环山乡受污染的农田为例)土壤动物群落结构的调查和在室内设置一定的污染浓度梯度处理的盆栽试验两种方式研究了重金属污染对土壤动物群落的影响,主要结论如下: 1。

Combinating the siol column and potted plant experiment synthesize analysis that the soil alkalinity below 30% can be all improved by hydraulic and agricultural measure without the chemical amendment. When the alkalinity is over 30%, however, the alkaline soil must be made use of the chemical measure gathering water conservancy to attain improvement .

结合土柱试和盆栽试验的结果综合分析,在土壤碱化度低于30%的轻、中度碱化土壤通过水利与农业措施相结合的办法而不用化学改良剂就可以改良好;而碱化度大于30%的土壤,必须在水利措施的配合下,利用化学改良剂才能达到改良的目的。

The present study was carried out on paddy osils under conditions of continuous application of organic manures.We found that organic manuer applied could provide nutrients deficient in rhizosphere, enchanced the formation of chelated compounds of Fe and Mn in root horizon and play a significant role in decreasing the lignifcation of meahanical tissue and in increasing the stelar catheter diameter of roots.

采用有机肥与化肥配施,在田间小区试验和盆栽试验的基础上,研究了有机肥促进根层络合态Fe和Mn的形成,补偿根际养分亏缺,并对根的皮下机械组织木质化程度降低,中柱导管的增大有明显的作用。

Looking at the building that use to house his friends and customers, their 401K plans and potted plants and comfortable lives, he winces."The bell has been rung," he says,"and you cannot unring it."

看着他的朋友和顾客曾经工作过的大厦、想到他们的401K年金计划和那些点缀着盆栽植物的办公室以及舒适的生活,他不由得摇头叹息道:&事情既已发生,谁也无法改变。&

The changes of nitrogen content, free amino acid, C/N ratio and chlorophyll content of wheat in wheat-faba bean intercropping system were studied by pot experiment with 3 N levels 0, 75 and 150 mg Nkg^(-1 soil. The results showed that leaf nitrogen content of intercropped wheat was higher than that of monocultured wheat at 3N level at tilling and booting stages, but was lower at heading stages.

为了解小麦蚕豆间作系统中小麦氮同化物的变化特征,探讨小麦蚕豆间作提高作物抗病性的可能机制,通过盆栽试验的方法,研究了小麦植株全氮含量、叶片游离氨基酸、叶片C/N比和叶绿素含量的动态变化及供氮水平对其的影响。

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