報(bào)告題目1： 兩個(gè)相反的初級(jí)演替生態(tài)系統(tǒng)中土壤有機(jī)質(zhì)的積累及土壤的發(fā)展研究

報(bào)告題目2： 廢水和自然水體生物有效性DON：在河流生態(tài)系統(tǒng)營(yíng)養(yǎng)限制中的作用

報(bào) 告 人： Robert Jerry Qualls 博士 美國(guó)內(nèi)華達(dá)大學(xué)自然資源與環(huán)境科學(xué)系

時(shí) 間： 5月31日 （周日） 下午 2：30-5：00

地 點(diǎn)： 農(nóng)學(xué)院103教室

歡迎相關(guān)專(zhuān)業(yè)教師和學(xué)生踴躍參加！

寧夏大學(xué)農(nóng)學(xué)院

2009年5月27日

附：Robert Jerry Qualls 博士個(gè)人簡(jiǎn)介

Education：

B.S. University of North Carolina

M.S. University of North Carolina

Ph.D. University of Georgia

Major Research Pursuits:

1）Biogeochemistry, formation of soil organic matter by microbial and chemical transformations, microbial mineralization

of humic substances;

2）how ecosystems develop means of retaining soluble organic nutrients during primary succession;

3）weathering of during primary soil development and development of adsorption capacity;

4）role of roots in exudation and leaching soluble organic matter, relationship between exoenzymes, immobilization

on clay surfaces and substrate hydrolysis in soil matrix;

5）N cycling in the Mojave desert; Bioavailability of P in sediment inputs to Lake Tahoe, ecophysiology and competitive

relationships of the invasive exotic Lepidium latifolium (tall white top) and other wetland invasive weeds, wetland biogeochemistry.