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以杂交玉米蠡玉16和冀单28为供试作物，采用供高磷（250 μmol/L）和低磷（5 μmol/L）营养液的石英砂培养方法，研究2个玉米品种的各器官干重和磷积累与分配、体内磷在木质部和韧皮部中的循环、流动及磷的吸收和利用效率。结果表明，与供高磷处理相比，低磷处理的2个玉米品种各营养器官的干重、磷含量和木质部中运输的磷量显著降低; 而磷在体内韧皮部的再循环显著增加，并且玉米各部位叶片活化出的磷主要是...
Assessment of metals accumulated in Durum wheat (Triticum durum Desf.), pepper (Capsicum annuum) and agricultural soils
Heavy metals soil contamination sequential extraction
2011/1/12
Soil contamination by heavy metals is widely spread and concerns have been raised over the potential risks to humans, animals and agricultural crops. Toxic metals are readily accumulated in some plant...
Assessing impact of soil management technologies on smallholder farmers’ livelihoods in north western Kenya
Impact assessment soil technologies
2011/1/13
Soil nutrient depletion is a major constraint to agricultural production on smallholder farms in Kenya. Intervention in the depletion through soil management project (SMP) was initiated in 1994 throug...
土壤深度对土磷素淋失的影响
土层深度 渗漏池 磷形态 淋失
2012/3/30
利用渗漏池设施，研究了冬小麦-夏玉米轮作条件下不同土壤深度对土磷素淋失的影响。种植8季作物结果表明，对深度小于80 cm 的渗漏池，淋出土体的累积渗滤液量和累积全磷量随化学磷肥施用量的增加而减少; 随土层深度的增加，淋出土体的渗滤液和磷量均减少，且二者的减少率都很接近，表明磷素淋失主要受通过土体的土壤水分控制。相对于深度小于80 cm的土层，供试土壤的粘化层有效地减少了土壤渗滤液和磷素淋失。各深度...
研究了17年长期定位施用化肥对黄土丘陵区坡耕地土壤物理性质的影响。结果表明: 长期施用化肥，表层（0—15 cm）土壤物理性状没有明显退化，中层（15—30 cm）和下层（30—45 cm）土壤物理性质有不同程度的改善; 长期施用化肥对水稳性团聚体影响大于土壤容重和孔隙度; 团聚体含量和稳定性在表层、中层和下层土壤中均得到不同程度地提高; 容重和孔隙度在表层和下层土壤中略有恶化，在中层土壤上得到改...
An analysis on the production of potato in Turkey according to NUTS level 1 regions
Potato production NUTS level 1 regions Turkey
2011/1/11
This study tried to determine the distribution shares of potato production and reasons of change in distribution with respect to NUTS level 1 regions. For this purpose, 43 year data of regional time s...
Impact of irrigation water quality, irrigation systems, irrigation rates and soil amendments on tomato production in sandy calcareous soil
Lycopersicon esculentum L saline water amendment irrigation methods irrigation rate water use efficiency
2010/2/24
Low quality water for irrigation can impose a major environmental constraint to crop productivity. Effects of water quality, irrigation system, irrigation rates, and type of amendment on the yield and...
福建早稻测土配方施肥指标体系研究
早稻 钾 临界指标 推荐施肥
2012/3/29
根据近年来完成的135个氮、磷、钾肥效试验结果，建立福建早稻测土配方施肥指标体系。结果表明，土壤对稻谷的平均贡献率为73.5%，施用氮、磷、钾平均增产18.1%、5.4%和8.6%，土壤贡献率和氮、磷、钾增产效果与肥力等级成正比。山区早稻高产临界指标分别为碱解氮212 mg/kg、Olsen-P 26 mg/kg和速效钾116 mg/ kg，沿海早稻则分别为碱解氮203 mg/kg、Olsen-P...
Land use pattern and sustainability of food crop production in the fadama of Southern Guinea Savanna of Nigeria
Fadama sustainability mixed cropping and use and management
2011/1/10
An assessment of the sustainability of food crop production in the fadamas of Southern Guinea Savanna of Niger State, Nigeria was carried out within the framework of small-scale farming households uti...
Assessment of Mercury-Polluted Soils Adjacent to an Old Mercury-Fulminate Production Plant
Mercury-Polluted Soils an Old Mercury-Fulminate Production Plant
2009/12/2
Mercury contamination of soils and vegetation close to an abandoned Hg-fulminate production plant was investigated. Maximum concentrations of Hg (>6.5 g kg−1 soil) were found in the soils ...
Tillage Effects on Spatiotemporal Variability of Particulate Organic Matter
Tillage Effects Spatiotemporal Variability Particulate Organic Matter
2009/12/2
This study was performed to evaluate effects of no-till (NT) and standard tillage (ST) on POM in two 15-ha neighboring fields from 2003 to 2004. We also evaluated the effects of minimum tillage (MT) o...
Copper-Zinc Interaction Additive, Affects Toxic Response in Soybean
Copper-Zinc Interaction Additive Toxic Response Soybean
2009/12/16
Agricultural soils accumulate trace metals, particularly copper and zinc, as a result of their presence in wastes (sewage biosolids and manures) and fungicides that are applied over long periods of ti...
The world's greatest wines are the result of a threefold synergy among grape variety, human input, and something called the “terroir” -- a term often defined as the vineyard site, soil, and climate.
不同播种方式对合丰50品质、产量及产量构成因子的影响
合丰50 播种方式 种植密度 品质和产量
2015/9/17
采用裂区试验设计研究了合丰50在不同播法和种植密度条件下的品质、产量及产量构成因子。结果表明：播法对品质、产量和所有产量性状的影响均不显著，其中穴播对产量、脂肪含量、单株荚数、单株粒数、单株粒重的正向效应均是最大的。密度对百粒重、脂肪含量均无显著影响，但对其它性状均有显著的影响。随密度增加，蛋白质含量逐渐增加，单株荚数、单株粒数和单株粒重逐渐减少；在不同密度处理下，26万株.hm-2、23万株.h...