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- Title
施磷增氧条件对水稻光合特性及镉吸收分配的影响.
- Authors
张文萍; 管啸; 钟诚; 易宇; 肖卫华; 易达理; 杨良玖; 吴根义
- Abstract
This study aimed to investigate the the response characteristics of cadmium(Cd) absorption and leaf photosynthetic characteristics under the interaction of oxydation and phosphorus application and to clarify the effect of oxydation and phosphorus application. In this study, a pot experiment was conducted using a hybrid rice C liangyou 608 as test material. Four P(P2O5)application levels, namely P1(no P), P2(0.18 g·kg-1), P³(0.36 g·kg-1), and P4(0.54 g·kg-1)and two irrigation methods consisting of non-oxydation irrigation(NI)method and oxydation irrigation(OI)method were designed. The dynamic change characteristics of leaf photosynthetic characteristics at different growth stage of rice and Cd migration and translocation regularity at maturity growth stage of rice were systematically studied. The relationship between Cd absorption and leaf photosynthetic characteristics was determined to reveal the compared with P1 treatment, P application promoted the absorption and translocation of Cd in rice roots and straw at maturity stage with NI or OI. In addition, translocation factors from straw to grain and Cd distribution percentage in rice grains under OI was lower than that under NI, and Cd distribution percentage in rice straw under OI was higher than that under NI. Grain-Cd of OIP1 was the lowest(0.13 mg·kg-1). Most of the Cd was concentrated in the roots(33.95%)and straw(46.18%), and only 19.87% of Cd was distributed in grains. Heading and filling stages were the key stages that affect Cd absorption at maturity stage. Oxygation method promoted the increase of photosynthetic capacity at the filling stage, promoted the transfer of Cd from root to straw, and reduced the transfer of Cd from straw to grain, redistributing Cd in rice. Our study implies that oxydation can adjust rice inner sensitivity to promote Cd redistribution in rice organs, and it provides a reference for promotinon innovation and technical integration of regulating Cd absorption and translocation in rice in the hilly areas of south China.
- Subjects
CHINA; RICE straw; TECHNOLOGICAL innovations; STRAW; MATERIALS testing; CADMIUM; HYBRID rice; RICE
- Publication
Journal of Agro-Environment Science, 2022, Vol 41, Issue 9, p1875
- ISSN
1672-2043
- Publication type
Article
- DOI
10.11654/jaes.2021-1346