Cropland soil organic matter content change in Northeast China, 1985-2005
نویسندگان
چکیده
منابع مشابه
Soil organic carbon sequestration potential of cropland in China
[1] Soil organic carbon (SOC) in cropland is of great importance to the global carbon (C) balance and to agricultural productivity, but it is highly sensitive to human activities such as irrigation and crop rotation. It has been observed that under certain improved management practices, cropland soils can sequestrate additional C beyond their existing SOC level before reaching the C saturation ...
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Agricultural soils are important sources of atmospheric N2O and CO2. However, in boreal agro-ecosystems the contribution of the winter season to annual emissions of these gases has rarely been determined. In this study, soil N2O and CO2 fluxes were measured for 6 years in a corn-soybean-wheat rotation in northeast China to quantify the contribution of wintertime N2O and CO2 fluxes to annual emi...
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We investigated the responses of cropland phenophases to changes of agricultural thermal conditions in Northeast China using the SPOT-VGT Normalized Difference Vegetation Index (NDVI) ten-day-composed time-series data, observed crop phenophases and the climate data collected from 1990 to 2010. First, the phenological parameters, such as the dates of onset-of-growth, peak-of-growth and end-of-gr...
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The analysis and forecast of the distribution and dynamics of soil organic matter (SOM) content is an essential requirement for sustainable land management, especially in Western Jilin, where the saline-alkalized land increased at a very fast rate per year and is in desperate need of improving soil. Compared to conventional analytical methods, hyperspectral remote sensing is faster, cheaper, no...
متن کاملDynamics of soil organic and inorganic carbon in the cropland of upper Yellow River Delta, China
Soil inorganic carbon (SIC) and organic carbon (SOC) are important carbon reservoirs in terrestrial ecosystems. However, little attention was paid to SIC dynamics in cropland. We conducted a survey in the upper Yellow River Delta of North China Plain. We collected 155 soil samples from 31 profiles, and measured SOC, SIC and soluble Ca2+ and Mg2+ contents. Our results showed that mean SOC conten...
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ژورنال
عنوان ژورنال: Open Geosciences
سال: 2015
ISSN: 2391-5447
DOI: 10.1515/geo-2015-0034