搜索结果: 1-15 共查到“土壤化学 Nitrogen”相关记录17条 . 查询时间(0.218 秒)
Effect of agricultural lands afforestation and tree species composition on the soil reaction, total organic carbon and nitrogen content in the uppermost mineral soil profile
acidification afforestation carbon nitrogen soil reaction
2015/3/10
Forests occupy one third of the world’s land area and govern carbon (C) transfers and influence nitrogen (N) content in the biosphere. Afforestation leads to soil changes of specific dynamics, often a...
Stand heterogeneity of total carbon and nitrogen, and C/N ratio in soil of mountain meadows
carbon nitrogen C/N ratio mountain meadow
2015/1/30
This study was aimed at monitoring the relative and absolute stand heterogeneity of total carbon, total nitrogen and C/N ratio in Ah-Ae-Btg-Bt horizons of Gleyic Luvisol on one mountain meadow divided...
Mineralization of nitrogen from 15N labeled crop residues at varying temperature and clay content
Rice and wheat residues straw N-mineralization immobilization
2011/2/22
A laboratory incubation experiment was carried out for 85 days to monitor the N mineralization during the decomposition of 15N labeled wheat and rice straws incorporated at 5 g kg-1 soil at varying te...
Effect of soil nitrogen levels on some micronutrients, antinutrients and toxic substances in Corchorus olitorius grown in Minna, Nigeria
Corchorus olitorius nitrogen level antinutrients toxic substances
2011/1/13
The nature of soil type is an important factor in the bioaccumulation of substances in plants. Application of nitrogen fertilizer is a common practice in vegetable farming. This study was therefore co...
Effect of Nitrogen Forms and Biostimulants Foliar Application on the Growth, Yield and Chemical Composition of Hot Pepper Grown under Sandy Soil Conditions
Capsicum annuum N forms Biostimulation K citrate K humate
2010/11/15
A study was conducted in order to assess the effect of different N fertilization forms
(ammonium sulfate, urea, calcium nitrate and ammonium nitrate) and biostimulants foliar application (potassium h...
Supplemental Nitrogen Fertilizer to Soybeans:III. Effects on nitrogen fixation
Acetylene reduction Nitrogen Nitrogen fixation Soybean Top-dressing
2009/8/6
Effects of (NH4)2SO4 top-dressing at the flowering stage to soybeans were investigated in view of its nitrogen fixation and assimilation. Possibility of estimating nitrogen fixation by time course mea...
Studies on the Effect of the Relative Humidity of the Atmosphere on the Growth and Physiology of Rice Plants : VIII. Effect of ambient humidity on dry matter production and nitrogen absorption at various temperatures
Dry matter production Heavy nitrogen Nitrogen absorption Relative humidity Rice.
2009/8/4
The effect of relative humidity (RH) on the dry matter production and nitrogen absorption of rice seedlings (age in leaf mumber of 5) was investigated. Plants were grown for 4 days under 60 or 90% RH ...
A Simplified Model for Estimating Nitrogen Mineralization in Paddy Soil
Drying effect Model Nitrogen mineralization Paddy soil Soil moisture before flooding Soil incubation Temperature
2009/7/30
The estimation of available nitrogen in paddy soil is important in order to evaluate rice productivity and to improve fertilizer management. In this study, a simplified model is proposed for estimatin...
Patterns of Soil Nitrogen Release in Paddy Fields of Warm Regions in Japan and Diagnosis of Fertilizer Application : III. Evaluation of amount of soil nitrogen supplied from paddy fields in relation to rice yield
Ammonification Nitrogen uptake Paddy soils Rate of Fertilizer application Soil nitrogen
2009/7/30
It was investigated whether the amount of ammonification could be used as an index of soil analysis for fertilizer application, which was related with the amount of soil nitrogen supplied from paddy f...
Nitrogen and Phosphorus Removal from Wastewater by Useful Plants and the Effect of Shading on the Removal Efficiency
Nitrogen removal Phosphorus removal Shading Solar radiation Wastewater
2009/7/22
Nitrogen and phosphorus removal from wastewater by a ditch planted with several plants, including terrestrial species, was studied. The effects on the removal rate by shading were also examined. Papy...
Cultivar Differences in Dependence on Nitrogen Fixation of Soybeans in the Field with a High Soil Nitrate Level Determinated by the Relative Ureide Abundance Method
Cultivar difference High soil nitrogen Nitrogen fixation Nodule Relative abundance of ureide
2009/7/8
Nitrogen fixation by soybeans is reduced by high soil nitrate levels. This reduced nitrogen fixation capacity increases the dependence on soil nitrogen, which may result in depletion of soil nitrogen...
Changes in Total Nitrogen and Total Carbon Contents in Soil and the Leaf Yield of a Long-Term Unfertilized Mulberry under Field Condition
Long-term unfertilized cultivation Mulberry Total soil carbon Total soil nitrogen Yearly leaf yield
2009/7/8
Total nitrogen and total carbon contents of the soil and the leaf yield in a long-term unfertilized mulberry field (NF) were compared with those in a chemically fertilized field (F) for 19 years from ...
Effect of clippings management on turfgrass sward productivity and nitrogen content in the clippings and soil
clippings turfgrass decomposition N mineralization cellulose lignin
2010/1/19
The maintenance of turfgrass sward includes mowing and fertilization. Every year
turfgrass sward produces a sizeable amount of clippings containing large amounts of nutrients
which will be availab...
PRODUCTION, ECONOMIC AND ENERGY EFFECTIVENESS OF WINTER BARLEY CROPPING AT VARIOUS RATES OF NITROGEN FERTILISATION
winter barley production and economic effectiveness nitrogen fertilisation
2009/3/30
Nitrogen fertilisation is one of the most effective yield-increasing factors but also one of the most critical items of cereal production costs. The aim of the present study was an attempt at definin...
Evaluation of Some Chemical Extraction Methods Used as Indices of Soil Nitrogen Availability in Polatlı State Farm Soils in Ankara Province
Potantially available nitrogen aerobic and anaerobic incubation chemical extraction arid and semi-arid regions mineralization
2009/1/14
In pursuit of evaluating the suitability of methods for determining the ability of soils to supply available nitrogen under different soil conditions, two biological aerobic and anaerobic incubation ...