共查询到18条相似文献,搜索用时 46 毫秒
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本文引用有关文献资料和研究,简要论述了腐植酸类物质和植物用腐植酸物质性能以及腐植酸类物质被植物吸收运转和分布的状况,分述了腐植酸物质对植物生理产生的主要影响以及由其影响所产生的作用。 相似文献
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我省泥炭资源较为丰富,约为2.84亿立方米,且分布较广,基本上属于低位型草本泥炭,富含有机质和腐植酸,一般含量分别为35—50%和10~25%,其次富含氮素1.3%,还含有沥青、纤维素、半纤维素和木质素等。由于泥炭含有多种有机物和具有多种多样的化学性质,故被世界各国广泛应用于各个领域。本文仅就泥炭腐植酸类物质在 相似文献
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发酵法黄腐酸与其它腐植酸类物质的表征对比 总被引:5,自引:0,他引:5
发酵法黄腐酸是以秸秆等农田下脚为原料人为控制条件发酵生成的一项新技术产品。本文对发酵法黄腐酸与几种矿源腐植酸、黄腐酸做了表征对比,对该物质的基本特性及结构特征提出了初步的看法。 相似文献
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介绍了泥炭腐植酸类物质用作水煤浆添加剂和型煤粘结剂的理论基础和实际应用效果。结果表明,将泥炭中含有的大量腐植酸类物质经过改性,用作水煤浆添加剂,在新汶煤、八一煤、邢台煤、兖州煤、鹤岗煤、抚顺煤、神华煤、双鸭山煤等煤种上使用,制浆浓度在65%~69%,粘度在1000mPa·s左右;用作型煤粘结剂,添加量在7%~10%,单个球的冷强度为55~88kg,热强度为50~70kg,常温下耐水性好,对灰分无增加,对环境无污染。 相似文献
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腐植酸的养分增效作用与机理 总被引:5,自引:0,他引:5
系统地研究了腐植酸对NPK养分的增效作用与机理。结果表明,风化煤中的腐植酸能显著提高沙土的保水保肥能力,减少养分淋失,适宜用量为100g/kg;NPK与腐植酸有效络合后颗粒的水稳性可延长到140小时,养分的释放速率比无机复合肥降低30%~40%;土培试验与田间观察试验表明,腐植酸复合肥对土壤有机质具有显著的超补偿效应,其机理在于对土壤微生物种群数量的激发效应增强;与等养分量的无机复合肥相比,施用腐植酸复合肥小麦体内NPK含量较高,生物产量提高6.05%,产量与体内养分含量同施肥量呈二次曲线趋势相关,适宜的NPK投入量为4.35g/pot(12.5kg土)。 相似文献
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腐植酸胶体稳定性及其对悬浮液稳定性的作用 总被引:2,自引:0,他引:2
本课题研究的是腐植酸胶体溶液自身的稳定性及腐植酸加入到固体悬浮液后对悬浮液稳定性的影响,本研究在理论上属于胶体及界面化学和高分子化学领域,有一定的交叉性,本研究的应用范围属煤化工。 相似文献
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I. I. Lishtvan G. V. Naumova A. E. Tomson G. V. Pirogovskaya N. A. Zhmakova N. L. Makarova T. F. Ovchinnikova 《Solid Fuel Chemistry》2011,45(4):226-232
Data on a technology for the manufacture of a new biologically active humic preparation based on the Neogene brown coals deposited in Belarus are presented. The physicochemical properties of the preparation are given, and its biological activity is evaluated; the results of plant cultivation tests in the basic crops of the region—potatoes and grain crops—are also considered. 相似文献
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Charge neutralisation plays a major role in heavy metal and humic substance removal in water treatment. Humic substances have no readily identifiable structure and they consist of anionic macromolecules of low to moderate molecular weight. Humic substances are easily coagulated using cationic metals and polyelectrolytes. Different concentrations of humic substances have been coagulated with different concentrations of heavy metals and/or polyelectrolytes. The charge neutralisation was determined using U.V. spectrophotometer. Humic substance removal increased with increasing salinity level until reaching a point where HS destabilization is considered complete and salinity no longer play a role in HS removal. Humic substance removal increased with increasing heavy metals concentration and precipitation was experienced at high concentrations of heavy metals (15–20 mg/L) and low concentration of humic substances (10 mg/L). In addition, HS removal also increased with increasing polyelectrolyte concentration. Diallydimethylammonium chloride (PDADMAC) polyelectrolyte was more effective in humic substance coagulation compared to copolymer of dimethyl aminoethyl acrylate (CoAA). The addition of heavy metals in polyelectrolyte coagulation increased humic substance removal due to the combined charge neutralization of the metals and polyelectrolytes. 相似文献
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经过5年5地对8种作物进行的田间试验,结果表明包裹型腐植酸长效尿素(UHA)和缓释腐植酸有机复合肥(SRCF)两个腐植酸类肥料新产品均对化肥有增效作用。 相似文献
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This review discusses the biochemical action and ecological significance of phototoxic phytochemicals. Mechanistic details of photosensitization as well as cellular and molecular targets of plant-derived phototoxins in model biological systems (microbial and in vitro) and in herbivorous insects are described. Findings from these studies suggest the potential importance of phototoxic plant metabolites in plant-insect interactions. Aspects of phototoxin distribution and significance in diverse ecosystems are considered, and areas for future research are suggested. 相似文献