The passage states that "ecosystem" is a complex system. What are the main components of an ecosystem? A. Plants and animals. B. Soil and water. C. Producers, consumers, and decomposers. D. Sunlight and air. 相关知识点: 试题来源: 解析 C。生态系统主要由生产者、消费者和分解者组成。A ...
Comparison of the Chemical Properties of Soil and the Main Components of the Southern Ecotype Garlic Cultivar Cultivated in the Volcanic or Non-volcanic Ash Soil of Jeju Islandallicindaeseomacro elementmicro elementnamdoalpha-glucosidase inhibitory activity...
AdsorptionofPCBsontomaincomponents insoi1andeffectofcoexistentCu+ CHENTao,SUNCheng—xun,YANGXiao—ying,ZHUBao—yu (JilinProvinceElectricPowerResearchInstitute,Changchun,Jilin130021,China) Abstract:Theselectiveextractiontechniquewasemployedtoseparatemainchemicalcompo— ...
aLike PMB, colistin also has two main components, colistin A and colistin B, and are acylated by (S)-6-methyloctanoic acid and (S)-6-methylheptanoic acid, respectively.272,273 象PMB, colistin也有二主要成份、colistin A和colistin B,并且由S -6-methyloctanoic (酸)和S -6-methylheptanoic (酸...
a冬季在低温干燥土壤内保持虫体 The winter maintains the insect body in the low temperature dry soil[translate] a它只花费你一分钟时间 It only spends your minute time[translate] athe main components of the lathe are the headstock and tailstock at the opposite ends of a bed 车床的主要成份是床头...
a主成分分析结果表明:该城区表明土壤前4个主要成分分别累计提取了总方差的82.88%,该结果表明所提取的主要成分能够较好地代表源数据所蕴涵的信息,能够很好地解释原各变量 The principal components analysis result indicated that,This city indicated the soil first 4 principal constituents accumulated separately have ...
This paper compared the growth,development,dry matter accumulation,yield components and their influence factors between high yielding rice(HYR)and super high yielding rice(SHYR)in different environments.The results showed that soil nutritional element contents in two environments had no significant influenc...
What is the point of making something that lasts 1,000 years?Shrilk not only will degrade in a landfill, but its basic components are used as fertilizer(肥料),and so will enrich the soil.Shrilk has great potential, the inventors said. Materials from which is made are plentiful in nature,...
mixtureofsoilandlocalgypsumsulphatesexplainedtheisotopiccompositionofmostofthecollected samples.Onesamplinglocationpresentedsamplesaffectedbyfertilizers.Nitrateconcentrationwassig- nificantlylowerinsurfacewaterthaningroundwater,withsyntheticfertilizersbeingthemainsource, especiallytheammonia/ureacomponents.Theisotopiccomposit...
a2、提高土壤养分含量,促使水稻营养达到平衡; 2nd, enhances the soil nutrient content, urges the paddy rice nutrition to achieve the balance;[translate] a多元微肥为稻田专用的高科技微量元素肥料,属中性、低残留、无害、无激素的水稻高产、优质、高效微肥。其主要成份:由硼、锰、铜、铁、锌等多种微量元素和...