|
| Effects of phosphorus and oxygation on photosynthetic characteristics, cadmium absorption, and distribution in rice |
| Received:November 20, 2021 |
| View Full Text View/Add Comment Download reader |
| KeyWord:leaf photosynthetic characteristics;cadmium absorption;phosphorus application;oxygation;the interaction of oxygation and phosphorus application;rice |
| Author Name | Affiliation | E-mail | | ZHANG Wenping | College of Hydraulic & Civil Engineering, Hunan Agricultural University, Changsha 410128, China | | | GUAN Xiao | College of Hydraulic & Civil Engineering, Hunan Agricultural University, Changsha 410128, China | | | ZHONG Cheng | College of Hydraulic & Civil Engineering, Hunan Agricultural University, Changsha 410128, China | | | YI Yu | Water Conservancy Engineering Administration of Hunan Province, Changsha 410007, China | | | XIAO Weihua | College of Hydraulic & Civil Engineering, Hunan Agricultural University, Changsha 410128, China | | | YI Dali | College of Hydraulic & Civil Engineering, Hunan Agricultural University, Changsha 410128, China | | | YANG Liangjiu | College of Hydraulic & Civil Engineering, Hunan Agricultural University, Changsha 410128, China | | | WU Genyi | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China | wugenyi99@163.com |
|
| Hits: 1540 |
| Download times: 1801 |
| Abstract: |
| This study aimed to investigate the the response characteristics of cadmium(Cd) absorption and leaf photosynthetic characteristics under the interaction of oxygation and phosphorus application and to clarify the effect of oxygation 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-oxygation irrigation(NI)method and oxygation 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 mechanism of Cd content reduction in rice grains(Grain-Cd)under oxygation and P at maturity growth stage. The results showed that, 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 oxygation can adjust rice inner sensitivity to promote Cd redistribution in rice organs, and it provides a reference for promoting theoretical innovation and technical integration of regulating Cd absorption and translocation in rice in the hilly areas of south China. |
|
|
|
