搜索结果: 1-6 共查到“土壤化学 changes”相关记录6条 . 查询时间(0.14 秒)
Using HYDRUS to simulate the dynamic changes of Ca2+ and Na+ in sodic soils reclaimed by gypsum
cation exchange ion transport leaching
2016/2/22
Sodic soils are characterized by the occurrence of excess sodium to levels that can adversely affect soil structure. In recent years, with the advent of alternatives for reclaiming sodic soils, such a...
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 ...
Changes the content of organic matter in soil during the whole cycle of crop rotation
soil humidity soil organic matter crop rotation
2010/1/19
The ecological crop rotation in the present trial has been established as a 10-field
rotation. The crop sequence was based on calculation of how much of the nutrients does one or
another crop take...
Changes of lignin concentration and C:N in oilseed rape, wheat and clover residues during their decomposition in the soil
Brassica napus crop top and root residue decomposition dry matter organic carbon and nitrogen ratio lignin Triticum aestivum Trifolium pratense
2010/1/15
Field experiments were conducted in 2003–2005 at the Experimental Station of the Lithuanian University of Agriculture to study the changes of lignin concentration and C:N in roots and top residues of ...
Changes in Activities of Glutamine Synthetase during Grain Filling and Their Relation to Rice Quality
japonica rice grain filling glutamine synthetase enzyme activity nitrogen content
2008/12/11
Four japonica rice varieties differed in cooking and eating qualities were used in a pot experiment to study the relationship between the activities of glutamine synthetase during grain filling and ri...
Phosphorus status of diverse soils in Finland as influenced by long-term P fertilisation 2.Changes of soil test values in relation to P balance with references to incorporation depth of residual and freshly applied P
Acetate extractable P Olsen P sampling depth total P water extractable P
2010/8/13
Fertilising with phosphorus (P) ensures continuous supply of an essential growth factor as necessary for productive and sustainable agriculture. The amounts of P required to attain and maintain an ade...