Results 41 to 50 of about 210 (92)
Study on System of Microbial Hydrogen Production [PDF]
, 2005 利用微生物将自然界中极为丰富的生物质降解为糖类物质，再转化为氢或乙醇等能源物质，对缓解人类目前所面临的能源危机，降低环境污染，实现经济的可持续发展战略等有重要的意义.本研究利用纤维素降解菌株灰绿曲霉（Aspergillusglaucus）XC9将秸秆（稻草粉）降解成糖类物质，并利用产氢微生物产酸克雷伯氏菌（Klebsiellaoxytoca）HP1，将其转化成氢，实现秸秆的综合利用；以曲霉所形成的菌丝球吸附并固定产氢细菌进行连续流产氢，建立了一种适用于连续流制氢过程中产氢细菌截留的新方法 ...
黄锦丽
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Response of Runoff and Sediment Yield from Maize Slope Farmland in Karst Areas to Slope Gradient [PDF]
[Objective] To elucidate the responses of surface runoff, subsurface runoff, and underground runoff hydrological pathways to slope in maize sloping farmland in Karst regions.
DAI Quanhou +4 more
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Shuitu Baochi Xuebao, 2006 在成都平原麦收后围绕免耕 麦秸覆盖还田栽种水稻的产量效应进行了研究,结果表明,(1)免耕处理较传统耕作水稻显著增产,主要是显著增加了单位面积有效穗数;(2)免耕 麦秸覆盖还田后,水稻产量增加,秸秆还田量与产量的关系符合多项式y=7238.6 0.0117x 2.12×10-5x2-1.49×10-9x3(R=0.988**),理论上还田麦秸以10 089 kg/hm2时水稻产量最高,此后开始下降;(3)与传统耕作比较,在水稻生长期,免耕明显加重了杂草的发生,但通过秸秆覆盖后可减少杂草发生 ...
王克如 +7 more
doaj +2 more sources
Effects of rumen microorganisms on the decomposition of recycled straw residue. [PDF]
J Zhejiang Univ Sci B, 2023 Song K +7 more
europepmc +1 more source
, 2018 脱贫攻坚是当前第一民生工程,在传播学话语体系下,充分发挥新闻舆情的宣传和监督职能,有效利用网络、报纸、电视、广播以及各种新媒体平台,积极宣传党的方针政策,广泛传播脱贫攻坚典型事例,是新闻舆情助推脱贫攻坚的有效路径。剖析农村脱贫攻坚中新闻舆情的现状,探索新举措 ...
敖淼
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Effect of Reforestation Tree Species on the Distribution and Stability of Purple Soil Aggregates [PDF]
[Objective] Afforestation following the Grain for Green initiative is a crucial measure to improve soil structure and reduce soil erosion. Understanding the mechanisms of the effects of afforestation tree species on the formation of soil aggregates can ...
HAN Guangzhong +4 more
core +1 more source
[Progress in preparation of plant biomass-derived biochar and application in pesticide residues field]. [PDF]
Se Pu, 2022 Zhang X, Zhen D, Liu F, Peng Q, Wang Z.
europepmc +1 more source
Shuitu Baochi Xuebao, 2018 通过长期定位试验，研究了秸秆还田和施氮后小麦生育期内土壤微生物量碳、氮（MBC、MBN）及可溶性有机碳（DOC）的变化，以期为关中麦玉轮作区土壤肥力的提升以及农业的可持续发展提供科学依据。采用裂区设计，主处理为玉米秸秆全量还田（S+N）和秸秆不还田（N），副处理为3个不同施氮水平（0，168，252 kg/hm2）共6个处理。结果表明：土壤MBC从小麦分蘖期至越冬期降低，此后至拔节期升高且达到峰值，拔节期至成熟期降低。各处理土壤DOC从分蘖期至拔节期增加，拔节期达到峰值，此后至成熟期降低 ...
张娟霞 +6 more
doaj
, 2001 研究了河南省固始县生态农业的现状、生态农业技术与生态农业模式,提出了基地建设、示范小区建设、配套项目建设、农村生态环境综合治理等生态农业建设的主要对策 ...
付元中 +4 more
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The Effectiveness of Culture in the Era of Social Transformation [PDF]
, 2018 departmental bulletin ...
15206, Li, Haiquan, 李, 海泉
core +1 more source