搜索结果: 1-14 共查到“农学总论 peat”相关记录14条 . 查询时间(0.054 秒)
Changes in the hydrophysical properties of peat soils under anthropogenic evolution
peat soils anthropogenic evolution water retention hydraulic conductivity
2008/11/24
The changes in the water characteristics of peat soils under anthropogenic evolution was investigated. It was stated that the transformation of organic formations as a result of drainage and agricultu...
Characteristics of soil-peat-rubble mixtures by mercury intrusion porosimetry
urban soil mercury intrusion porosimetry gra- nulometric composition organic matter rubble
2008/11/24
The effect of cyclic changes of temperature and the addition of organic matter on pore properties of model urban soil was investigated. Mixtures composed from a loessial soil with 10�50% w/w of...
Dynamics of organic matter in peat soil under the conditions of sand-mix culture during 15 years (a short communication)
peat soil organic matter sand-mix culture
2008/11/24
The results of a 15-year investigation on the dynamics of organic matter in peat soil under the conditions of sand-mix culture (SMC) are presented. The generalisation of the obtained results show that...
Calibration of TDR for moisture determination in peat deposits
peat soils TDR calibration bulk density
2008/11/21
Determination of soil water content using the Time Domain Reflectometry (TDR) method is recently considered modern and widely used. The practical application of TDR requires its calibration ie determ...
Effect of peat decomposition on the capillary rise in peat-moorsh soils
capillary rise peat moorsh unsaturated hy- draulic conductivity
2008/11/20
The paper shows the application of the steady state soil moisture flow theory for three different peat-moorsh (Ferric Histosols) soil profiles from the Biebrza River Valley. The unsaturated hydraulic ...
Effect of solid phase wettability on water transport and retention in peat enriched soil affected by freezing/thawing
wettability water retention freezing/thawing soil
2008/11/20
Samples of A and B horizons of arable loessial soil, with and without the addition of c.a. 9% of peat and subjected to six freezing/thawing cycles, were studied. Surface free energies and water contac...
Phosphorus release from peat soils under flooded conditionsof the ｊczy駍ko-W硂dawskie Lake District
high-moor peat low-moor pet phosphorus release
2008/11/14
The aim of this paper was to study the process of phosphorus release from peat soils under flooded conditions and to specify the time and conditions in which this process takes place. Studies were con...
Plant contribution to methane emission after irrigation of peat soilwith municipal waste water
methane emission irrigation redox potential waste water grass
2008/11/14
The ability of some plants to grow and develop in the soils with limited access to oxygen results not so much from the biochemical differences in their root metabolism, but from the access of oxygen f...
Verification of the van genuchten method of determination of the hydraulic conductivity of peat soils
hydraulic conductivity peat soils Van Genuchten mode capillary rise
2008/11/10
The knowledge of hydraulic conductivity in unsaturated zone K{h) has a great theoretical and practical importance for soil water balance. The existing measurement methods of that parameter are rather ...
Water retention characteristics of peat and sand mixtures
peat - sand mixtures water retention
2008/11/10
The water retention characteristics of peat, sand and their mixtures has been investigated. The results obtained showed that the hydro-physical properties of the mixtures in- vestigated depended on th...
This paper presents the results of the investigations of water-air relations in peat, sand and their mixture. It was stated that the addition of sand into peat radically changes its water...
Changes in the structure of nitrogen-containing compounds of peat, sapropel, brown coal and organic fertilizers on their basis
peat sapropel brown coal organic fertilizers nitrogen products degradation amino acids
2010/1/15
The three-stage acidic hydrolysis method was used for the degradation of three organic fertilizers prepared on the basis of peat, sapropel and brown coal. This method of hydrolysis may simulate the pr...
Impact of secondary transformation of peat-moorsh soils on the decrease of nitrogen and carbon compounds in ground water
secondary transformation of peat N-total N-NO3- N-NH4+ forms of organic carbon
2010/1/15
The study of peatland is used to show the water quality functioning with respect to different forms of nitrogen and carbon. In this paper, the purification of ground water by the transect of 4.5 km le...
Sources of acidity and metals in a stream draining acid sulphate soil, till and peat, western Finland, revealed by a hydrochemical and sulphur isotope study
acid sulphate soil alkali metals alkaline earth metals sulphur ditching sulphur isotopes land use catchment area
2010/8/11
The main aim of this study was to determine, during extreme hydrological conditions, the source(s) of acids, sulphate and metals (alkali and alkaline earths) in the Munsala stream (western Finland) dr...