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- Title
恩施州咸丰县土壤—水稻系统锗元素迁移转化及影响因素.
- Authors
夏伟; 段碧辉; 王天一; 王芳; 赵敏; 李春诚; 袁知洋
- Abstract
[ Objective]This paper aimed to explore the law of germanium migration and transformation in soil-rice system and its influencing factors under actual production conditions in the field. [Method] 60 samples of rice root soil, 60 samples of grain and 10 samples of root, stem and leaf were collected systematically In Xianfeng county, Enshi prefecture, Hubei province. Nutrient elements such as germanium and selenium, organic matter content, pH value in rice root soil and content of germanium and some nutritive elements in root, stem and leaf of rice were tested, the correlation analysis of germanium content in soil and rice seeds was conducted, and the factors affecting the bioabsorption coeffi. cient of germanium in rice and the regularity of germanium transfer and transformation in soil-rice system were studied. [ Result] The average germanium content in the rice root soil of Xianfeng county was 1. 58 mykg, slightly lower than the background value of germanium content in soil in China ( 1. 70 mwkg). The average content of germanium in rice seeds was only 0. 031 mwkg,but the content of germanium in rice seeds in Pingbaying town in the south of Xianfeng county was much higher than that in Nanchuan district of Chongqing city and Changshan county of Zhejiang province, which had been reported. The average content of selenium in rice seeds in the whole region was also 0. 072 my kg, which showed great potential for the development of rice rich in germanium and selenium. The bioabsorption coefficient of germanium in rice was generally low, only 0. 29% - 6. 04%, and the accumulation rule of germanium in rice was only 30 %, which completely conformed to the rule and result of previous experiments : stem and leaf > root > brown rice, most of them still conformed to the general element migration law: root > stem and leaf > brown rice. [ Conclusion ] Correlation analysis showed that the germanium absorption capacity of rice was very significantly positively correlated with soil organic matter content, Ge and S content in root soil, and significantly positively correlated with pH value. However, there was an insignificant negative correlation with the nutrient elements Na2O, SiO2,Al2O3 and K2O.
- Subjects
HUBEI Sheng (China); ZHEJIANG Sheng (China); CHONGQING (China); SOIL seed banks; SELENIUM; RICE seeds; GERMANIUM; MOBILITY of law; ORGANIC compounds; BROWN rice
- Publication
Southwest China Journal of Agricultural Sciences, 2021, Vol 34, Issue 12, p2748
- ISSN
1001-4829
- Publication type
Article
- DOI
10.16213/j.cnki.scjas.2021.12.027