搜索结果: 1-12 共查到“农业基础学科 Zn”相关记录12条 . 查询时间(0.187 秒)
【目的】畜禽粪便有机肥的施用是造成我国农田土壤重金属污染的重要原因之一。本文选用两种典型规模化养殖场畜禽粪便有机肥,研究其在石灰性土壤和酸性土壤上施用1年后Cu、 Zn的有效性和形态归趋,为客观评价畜禽粪便有机肥中重金属进入土壤后的环境行为和生态风险提供理论依据。【方法】采用温室土壤培养试验,在石灰性土壤和酸性土壤上分别设对照(CK)、 施2%鸡粪(CM2%)、 施5%鸡粪(CM5%)、 施与CM...
[目的] 在潜在缺锌石灰性土壤上,特别是种植小麦并以此为主粮的地区,缺锌问题日益受到人们的关注。提高小麦籽粒锌含量以满足人体锌需求,对于改善人体锌营养不良的现状具有重要意义。[方法] 以ZnSO4和Zn-EDTA为锌源,布置了2个为期两年的田间定位试验。试验均采用裂区设计,即主因子为喷施锌肥,设喷施与不喷2个主处理;副因子为土施方法,设不施锌、均施、条施3个副处理。在第1季试验基础上,第2季不再土...
河北农业大学植物营养学课件第六章 微量营养元素 Cl Cu Fe Mn Mo Ni Zn
河北农业大学 植物营养学 课件 第六章 微量营养元素 Cl Cu Fe Mn Mo Ni Zn
2014/4/14
河北农业大学植物营养学课件第六章 微量营养元素 Cl Cu Fe Mn Mo Ni Zn。
Effect of Zn, Cd and Cr on growth, water status and chlorophyll content of barley plants (H. vulgare L.)
Heavy Metal Growth Chlorophyll Fluorescence Chlorophyll Content Barley
2013/2/28
To evaluate the potential of barley for the phytoremediation of soils contaminated by metals, we conducted a growth chamber experiment with plants exposed to various concentrations of Zn, Cd and Cr. G...
采用室内接种法,以赤子爱胜蚓(Eisenia fetida)构建生物反应器,研究猪粪、木屑混合物的蚯蚓堆制处理中,蚓体的生长状况及影响其Cu、Zn富集的主要因素。结果表明,接种密度为40 mg·g-1、湿度为75%同时有利于蚯蚓生长和基质消耗;温度为15℃对蚓体质量增加最有利,而温度为20℃最利于基质消耗;m(猪粪):m(木屑)为6:4可同时利于蚓体质量增加和基质消耗。适宜的接种密度(48 mg·...
利用微波消解火焰原子吸收光谱法(FAAS法)测定产地为黔东南林区丹寨县的原生态硒米中微量元素Zn、Cr的含量,并讨论这2种元素在人体内的生理功能。
Prediction of extractable metals (Cd, Pb, Fe Cu, Mn and Zn) in sewage
Sewage sludge heavy metals sequential extraction bioavailability
2010/9/14
The study shows that the metal ion binding to the biotic surface such as sewage is pH dependent and that there is an optimum pH for bioavailability of metals. The influence of the sludge pH and organi...
Pb/Zn尾矿上3种苔藓植物对重金属富集能力的比较
重金属 苔藓 富集系数
2009/7/17
[目的] 研究Pb/Zn尾矿上楔瓣地钱(Marchantia emarginata Reinw.)、双色真藓 (Bryum dichotomum Hedw.)、衮州卷柏[Selaginella involvens (Sw.)Spring]3种苔藓植物对重金属的富集能力。[方法] 以三门Pb/Zn尾矿砂堆积地为研究地点,调查苔藓植物体内以及相应尾矿基质中的5种重金属(Cu、Pb...
Structural and Zn-binding features of ortho- and pyrophosphate modified soil metal-humus sorbents (Features of P-modified humus sorbents)
humus ligand structure phosphate fertilizers zinc binding
2008/11/11
The results of the experiments showed that the P treatment considerably enhanced the Zn-binding capability of acid soil. The contribution of ortho- and pyro-P to Zn binding was that they changed the s...
采用营养液培养法,研究了不同Zn浓度(0,0.25,0.50,1.00,2.00 mmol/L)对黑麦草幼苗生长、过氧化物酶活性、脯氨酸、根系活力及Zn吸收的影响。结果表明,低锌胁迫对黑麦草幼苗生长无抑制,过度锌胁迫(Zn≥2 mmol/L)将降低黑麦草地上部干质量。幼苗叶内游离脯氨酸含量随锌胁迫时间、锌浓度增加而增加。随Zn胁迫时间增加幼苗POD活性先降后升、根系活力先升后降,锌处理的植株地上部...
Comparison of the Influence of Cu, Zn, and Cd on the Acticity and Kinetics of Free and Immobilized Acid Phosphatase
acid phosphatase heavy metal immobilized enzyme mineral soil clay
2007/6/26
The influence of Cu, Zn, and Cd on the activity and kinetics of acid phosphatase immobilized by two soil clays, kaolin or goethite was investigated. The Ability of Cu to inhibit the enzyme activity wa...
The Effect of Boron (B) Application on the Growth and Nutrient Contents of Maize in Zinc (Zn) Deficient Soils
Zn deficient boron maize nutrient element
2010/11/8
A pot experiment with maize plant grown on zinc (Zn) deficient soil was conducted to study the effect of increasing boron (B) and zinc (Zn) application nutritional status and shoot growth under greenh...