![]() ![]() These findings provide new insights into the changes in soil nutrients and microbial communities during the conversion of grassland to cropland in the agro-pastoral ecotone. In addition, the stochastic process was the dominant assembly pattern of the bacterial community in cropland, whereas, in grassland soil, the community assembly was more deterministic. These results also suggest that the tillage promotes the migration and coexistence of bacterial communities in the grassland soil of an agro-pastoral ecotone. Different letters at the top right corner of the mean values indicate significant difference at p < 0.05. In particular, the higher migration rate may increase the coexistence patterns of the bacterial community in cropland soils. Table 1 Comparison of stand factors (mean ± S.D.) among the three stand zones of the tropical coniferous-broadleaved forest ecotone (P: pine forest zone E: ecotone zone B:broadleaved forest zone). Tillage promotes uniformity of bacterial communities in cropland soils. Proteobacteria (30.5%) and Acidobacteria (21.7%) were the key components in cropland soil, whereas Proteobacteria (31.5%) and Actinobacteria (27.7%) were the main components in grassland soils. Abstract From 1998 to the present, the Chinese government has implemented numerous large-scale ecological programs to restore ecosystems and improve environmental protection in the agro-pastoral ecotone of northern China (APENC). tortuosa in relation to climate variability: evidence from central Sweden. We are particularly interested in place-based work. The pH value and the content of total nitrogen, organic material, total potassium, and total phosphorus in cropland soil were well above those in grassland soil, whereas the soil bulk density and ammonia nitrogen content in grassland soil were higher than those in cropland soil. Tree limit dynamics of Betula pubescens ssp. Ecotone, the literary magazine dedicated to reimagining place, welcomes work from a wide range of voices. Results indicated that soil nutrients and composition of bacterial communities changed dramatically in the process of land-use change from grassland to cropland. In the desert-oasis ecotone of Northwest China, environmental risks to agriculture, such as water shortage, remain serious and limit the increase of agricultural productivity (Kang et al., 2017 Zhao et al., 2018).The risks of water shortage are increased and water productivity is decreased by excessive cropland water losses, such as high rates of deep drainage. Sell custom creations to people who love your style. Upload stories, poems, character descriptions & more. ![]() Here, we investigated the structure and assembly mechanism of bacterial communities in cropland (tillage) and grassland (non-tillage) from an agro-pastoral ecotone of Tibet. Share your thoughts, experiences, and stories behind the art. However, knowledge of the effects of land change from grassland to cropland on soil nutrients and microbial communities is poor. In the Tibetan agro-pastoral ecotone, which has an altitude of 4000 m above sea level, small-scale cropland tillage has been exploited on the grassland surrounding the houses of farmers and herdsmen.
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