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2006年06月20日

【期刊论文】区分土壤中硝化与反硝化对N2O产生贡献的方法

吕军, Huang Shuhui, L

农业工程学报,2005,21(增刊):48~51,-0001,():

-1年11月30日

摘要

土壤是产生N2O的最主要来源之一。硝化和反硝化反应是产生N2O的主要机理,由于硝化和反硝化微生物同时存在于土壤中,因而硝化和反硝化作用能同时产生N2O。N2O的来源可通过使用选择性抑制剂,杀菌剂以及加入的标记底物确定。通过对生成N2O反应的每一步分析,主要从抑制反应发生的催化酶和细菌着手,总结了测量区分硝化、反硝化和DNRA反应对N2O产生的贡献方法。并对15N标记底物法,乙炔抑制法和环境因子抑制法作了详细介绍。

土壤, 氧化亚氮, 硝化与反硝化, N2O

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2006年06月20日

【期刊论文】浙江红壤区水分条件对冬小麦生长的动态耦合模拟*

吕军, Lu Jun

水利学报,1998,(7):68~72,-0001,():

-1年11月30日

摘要

举文讨论了土壤水分运动与作物生长动态耦合模型的建立方法经与试验结果比较,验证了土壤水分运动和作物生长动态耦合模型对冬小麦生长过程模拟的可靠性,分析了模型中有关作物旱害和渍害耦合参数的灵敏性应用该模型对南方多雨地区冬小麦生长进行的分析。

冬小麦,, SPAC水分运动,, 作物模型,, 水分与作物生长耦合作用,, 模拟

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2006年06月20日

【期刊论文】The effects of irrigation regimes on the water use, dry matter production and physiological responses of paddy rice

吕军, Jun Lu, Taiichiro Ookawa and Tadashi Hirasawa, *

Plant and Soil 223: 207~216, 2000.,-0001,():

-1年11月30日

摘要

In most cases, rice production is associated with flooding irrigation and the efficiency of irrigated water use (WUEi) is generally lower for production of rice than for other crops. We have examined the effects of various irrigation regimes on water consumption in a well-puddled paddy field, as well as on dry matter production, grain yield and physiological responses of the plants. Four sets of conditions were studied, with two replications, in the well-puddled paddy field: Continuous flooding irrigation treatment (CSF); three intermittent irrigation treatments, designated Ⅱ-0, Ⅱ-1 and Ⅱ-2, in which plants were re-irrigatedwhen the water potential of the soil fell below0, 10, and -20 kPa at a depth of 5 cm, respectively. Water consumption was lower during Ⅱ-0 than during CSF because the percolation rate was reduced by the reduction in the hydraulic head of the ponded water. Intermittent irrigation led to the repeated shrinking and swelling of soil during Ⅱ-1 and Ⅱ-2 and, therefore, soil cracks developed rapidly. Since they became the major routes of water percolation, these soil cracks increased water consumption during Ⅱ-1 and Ⅱ-2 above that during CSF and Ⅱ-0. There were no significant differences in dry matter production and grain yield between CSF and Ⅱ-0, but both were significantly greater than in the case of Ⅱ-1 and Ⅱ-2. Therefore, WUEi increased in the following order: Ⅱ-0, CSF, Ⅱ-2, Ⅱ-1, although the difference was very small between Ⅱ-1 and Ⅱ-2. A lower crop growth rate (CGR) resulted from a decrease in the net assimilation rate (NAR) during II-1 and Ⅱ-2, and there was also a reduction in the leaf area index (LAI) during Ⅱ-2. Early senescence with ripening and water stress around midday decreased the rate of photosynthesis in leaves, causing the lower NAR. These physiological responses of the plants were responsible for the reduction on the dry matter production and grain yield in the intermittent irrigation.

drymatter production,, irrigation water use,, leaf senescence,, paddy rice,, photosynthesis,, soil water potential

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2006年06月01日

【期刊论文】红壤退化过程与生态位的研究*

吕军, Xie Zhengmiao, Lu Jun, Yu Jinyan and Huang Changyong

Chin. J. Apl, Ecol., 1998, 9 (6): 669~372,-0001,():

-1年11月30日

摘要

应用生态位概念研究红壤退化和改良过程中的生和生物学特征及其与生态环境条件的关系,把戏壤的生物学循环作为重点,分析红壤生态位的演化特点,探索红壤生态系统退化和重建的若干规律和描述方法,以求建立有关红壤退化评价的方法和指标体系。

红壤 退化 生态位 生物学特征

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2006年05月29日

【期刊论文】氮、磷的农业非点源污染防治方法

吕军, YUAN Shao-feng, LU Jun, YU Jing-yan

水土保持学报,2004,18(1)122-125,-0001,():

-1年11月30日

摘要

非点源污染最主要的影响就是使水体富营养化、水质变差,从而影响到生产、生活、社会与经济的发展,其中氮、磷的农业非点源污染又是最主要的。经过3O多年的研究,非点源污染研究逐渐从初期的定性化研究转向定量化,由统计、调查与机理研究转向实用治理研究。就众多的防治方法来看,大体可以分为两大类,即“源”(Source)防治和“汇”(Sink)防治。

氮, 磷, 非点源污染, 防治, 农业

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    浙江大学,浙江

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