Subjects: Biology >> Ecology submitted time 2018-03-14 Cooperative journals: 《生态学报》
Abstract：作物根际土壤微生物群落对土壤生态及作物健康至关重要。以棉花黄萎病不同发生程度棉田的土壤为研究对象，采用理化分析、微生物纯培养及高通量测序技术对土壤理化性质及微生物数量、细菌丰度多样性进行综合分析。结果表明：在纯培养条件下，大丽轮枝菌无菌发酵滤液对细菌生长有明显的抑制作用；棉田接种大丽轮枝菌对土壤中细菌、真菌、放线菌的数量及细菌菌群丰度多样性未产生明显影响，不同采样时间的土壤中细菌菌群结构差异更大。土壤中大丽轮枝菌微菌核数量与棉花黄萎病的发生程度呈显著正相关。土壤肥力对土壤中微生物数量起主导作用，而水稻-棉花轮作能够使棉田有效降盐、减病、改善土壤肥力。通过生物防治、作物轮作、深翻等调控措施增加土壤中有益菌群数量、改善土壤生态、降低棉田土壤中大丽轮枝菌菌源数量是减轻棉花黄萎病危害的基础。
Subjects: Psychology >> Personality Psychology Subjects: Psychology >> Other Disciplines of Psychology submitted time 2023-03-31
Abstract： Persistence, a personality to finish what one starts even when faced with obstacles, is one of the most important personalities for human beings to achieve their goals and objectives. Although most persistence studies have discovered the significant influence persistence has on the individual level, extant research on persistence is incomplete because whether persistence varies on the regional level is still unknown. However, recent research has indicated that personalities vary systematically across regions, and correlate significantly with macro indexes on the regional level. To address this literature gap, we argue that persistence varies across Chinese provinces, and develop and validate a province-level persistence index (PPI) to quantify such provincial variations. We also try to explore the province-level antecedents and consequences of provincial variations in persistence. We used the Chinese General Social Survey (CGSS) as our main data source for the development of province-level persistence index. CGSS measured participant’s persistence in 2008 and 2011. A high correlation between the province-level persistence index in 2008 and in 2011 allowed us to combine data from the two years. Therefore, the final sample included 11,330 participants (6,006 were female) from 29 provinces, municipalities and autonomous regions. In the CGSS, the persistence scale was consisted of three items. We first carried out a survey on Credamo.com to validate the persistence scale in CGSS, the sample of which included 286 participants (142 were female). We also used data from National Bureau of Statistics of China, CSMAR, etc. as the data sources of antecedent and outcome variables of persistence. We used STATA 15 to analyze the data. Results showed that the three-item measure of persistence in CGSS is reliable and valid and the persistence data from CGSS is suitable for aggregation. In general, persistence does vary systematically across Chinese provinces and the PPI we developed is significantly related to antecedent and outcome variables documented in the existing research. Specifically, the harshness of the natural environment (coldness, air pollution and agricultural disasters), cultural values of masculinity and collectivism are positively related to PPI. Moreover, PPI is positively related to political (local government officials’performance orientation and effort allocation distortion), economic (economic development quality, industrial structure upgrade and foreign investment introduction), social (education attainment, income, and well-being of the residents) and innovative and entrepreneurial (patent authorization, company incubation) outcomes, even after controlling for provincial GDP and year fixed effect. The current study demonstrates the systematic difference in persistence across Chinese provinces, extends individual level research on persistence to macro regional level, and develops province-level persistence indexes to provide an important tool for future research dealing with regional differences. We also systematically explored antecedents of provincial variations in persistence, and its influences on province-level macro metrics, offering a perspective of macro-micro intersection. Furthermore, we provide new references for government’s development policy making and companies’ branch management.
Peer Review Status:
Awaiting Review
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