一、物种编目 二、物种濒危等级属于掌握部分 三、物种保护优先序

山东农业大学：《经济学》课程教学资源（PPT课件）10 经济周期与经济增长

山东农业大学：《经济学》课程教学资源（PPT课件）09 通货膨胀与失业理论

1.前言 Introduction 2.生物多样性及其起源与研究层次? 3.世界生物多样性现状? 4.中国的生物多样性? 5.遗传多样性 Genetic diversity 6.物种多样性 Species diversity

1.物种编目 2.物种濒危等级属于掌握部分 3.物种保护优先序

1.物种编目 2.物种濒危等级属于掌握部分 3.物种保护优先序

山东农业大学：《经济学》课程教学资源（PPT课件）07 国民收入的核算理论与方法

Aims of this lecture Summarize properties of the rhizosphere, especially Gradients in Nutrient concentration Redox potential Exudates Microbial activity Non-infecting rhizosphere microorganisms Infecting rhizosphere microorganisms that are relevant to plant mineral nutrition red from H Marschner:

Concept of plant nutrition Plant nutrition is a term that takes into account the interrelationships of mineral elements in the growth medium as well as their role in plant growth

The principles of application fertilizers Law of the Minimum: the crop's yield is restricted by the lack of one element, even Mg- al Zn S though there may be sufficient quantities of all the