Jiangxi Super rice Research and Development Center

Nanchang, China

Jiangxi Super rice Research and Development Center

Nanchang, China
SEARCH FILTERS
Time filter
Source Type

Hou H.-Q.,Jiangxi Academy of Agricultural science | Hou H.-Q.,National Engineering and Technology Research Center for Red Soil Improvement | Hou H.-Q.,Key Laboratory of Crop Eco physiology | Huang Y.-L.,Jiangxi Super rice Research and Development Center | And 11 more authors.
Chinese Journal of Rice Science | Year: 2016

In order to study the effects of controlled-release fertilizer application on double cropping rice, a successive 2-year location-fixed field experiment was carried out in double cropping region in red soil paddy field derived from the Quaternary red clay in Nanchang, Jiangxi Province of southern China. The field experiment covered 4 treatments including no fertilizer (CK), recommended application split by three times (OF), controlled release fertilizer all used as basal fertilizer (100CRF) and 80% controlled release fertilizer all used as basal fertilizer (80CRF), and each treatment had three replicates. During the two years plantation, rice yield, rice nitrogen uptake and nitrogen use efficiency of each treatment were measured and the conclusion could be drawn that the average yield for the two years followed the order of 80CRF > 100CRF > OF > CF > CK, and the treatment 80CRF, 100CRF, and OF increased rice yield by 25.32%, 23-93% and 23.86% respectively, compared with CK (P < 0.05). However there was no significant difference between different nitrogen fertilizer treatments. As for the average nitrogen uptake in two years, 100CRF and 80CRF treatment were significantly higher than OF treatment in early rice and 100CRF treatment was higher than OF treatment in late rice (P < 0.05), but 80CRF and OF were no significant difference in late rice. The nitrogen uptake manifested same trend between straw and grain. The nitrogen recovery efficiency of 100CRF, 80CRF treatment were significantly higher than the OF treatment (P < 0.05). Nitrogen agronomic efficiency, partial factor productivity of applied N at the highest of 80 CRF, is significantly higher than 100CRF and OF treatments (P < 0.05). Nitrogen physiological efficiency and Soil N dependent rate at the highest of 80 CRF in late rice in 2012 and OF in double-rice in 2013 respectively, were significantly higher than 100CRF treatment (P < 0.05), but there was no significant difference between 80CRF and OF treatment. Therefore, one-time use of controlled release fertilizer regardless of the quantity and reduce the dosage of 20%, it could reach the recommended fertilization production levels, and could significantly increase the nitrogen content and uptake in rice. Full amount of controlled release fertilizer utilization rate of nitrogen fertilizer could only improve nitrogen uptake both early rice and late rice, but caused N luxury absorption and nitrogen physiological efficiency lower; Reduced by 20% controlled release fertilizer, the nitrogen recovery efficiency, the agronomic efficiency, and the partial factor productivity for applied N were significantly improved in early and late rice. There was no difference in nitrogen physiological efficiency between 80 CRF treatment and optimized fertilization. On the basis of stable yield, 80CRF treatment has saved the cost and improved the effect of the nitrogen utilization.


Hu B.-L.,Jiangxi Academy of Agricultural science | Hu B.-L.,Jiangxi Normal University | Li X.,Jiangxi Academy of Agricultural science | Wan Y.,Jiangxi Academy of Agricultural science | And 3 more authors.
Chinese Journal of Applied Ecology | Year: 2015

To identify the low nitrogen tolerance of Dongxiang wild rice (DXWR) and its progenies, ten phenotypic traits including plant height (PH), heading day (HD), panicle length (PL), number of effective tillers per plant (NETP), number of filled grains per panicle (NFGP), number of grains per panicle (NGP), grain density (GD), spikelet fertility (SF), 1000-grain mass (TGM) and grain yield per plant (GYP) were studied under normal and low nitrogen treatments, using backcross inbred lines (BILs) of Xieqingzao B//DXWR/Xieqingzao B in BC1F12. Comprehensive evaluation on the low nitrogen tolerance of the BILs population was conducted using principal component analysis and the subordinate function. The evaluation results indicated that the low nitrogen tolerance of the line 116, 143 and 157 was the strongest, which could be served as the intermediate materials for genetic studies on the low nitrogen tolerance of DXWR and breeding for the low nitrogen tolerance in rice. The optimal regression equation of the low nitrogen tolerance in rice was established using stepwise regression analysis. The relative values of five traits including PH, NGP, SF, TGM and GYP were screened out and could be used as comprehensive evaluation indices for the low nitrogen tolerance in the whole growth stage. Therefore, more attention should be paid to the relative values of these five traits, especially for NGP and GYP, in the genetic improvement of the low nitrogen tolerance in rice. ©, 2015, Editorial Board of Chinese Journal of Applied Ecology. All right reserved.


Peng X.,Nanchang University | Ding X.,Nanchang University | Chang T.,Nanchang University | Wang Z.,Nanchang University | And 4 more authors.
The Scientific World Journal | Year: 2014

High soils salinity is a main factor affecting agricultural production. Studying the function of salt-tolerance-related genes is essential to enhance crop tolerance to stress. Rab7 is a small GTP-binding protein that is distributed widely among eukaryotes. Endocytic trafficking mediated by Rab7 plays an important role in animal and yeast cells, but the current understanding of Rab7 in plants is still very limited. Herein, we isolated a vesicle trafficking gene, OsRab7, from rice. Transgenic rice over-expressing OsRab7 exhibited enhanced seedling growth and increased proline content under salt-treated conditions. Moreover, an increased number of vesicles was observed in the root tip of OsRab7 transgenic rice. The OsRab7 over-expression plants showed enhanced tolerance to salt stress, suggesting that vacuolar trafficking is important for salt tolerance in plants. © 2014 Xiaojue Peng et al.


Peng X.,Nanchang University | Liu R.,Nanchang University | Yang J.,Wuhan University | Yang J.,State Key Laboratory of Hybrid Rice | And 5 more authors.
Chinese Journal of Applied and Environmental Biology | Year: 2014

In order to study the pathway of rice response to abiotic stresses and discover the molecular mechanisms of stress tolerance in rice, we constructed a mixed cDNA library by using Gateway technology from rice roots subjected to salt and drought treatments. The quality assessment of this library showed that the titer of the unamplified library was 1.5 × 106 cfu, and the average insert size about 1 kb with recombination efficiency of 100%. In this study, randomly-selected clones were sequenced to find many functional genes, including glycosyl hydrolases, stress induced protein, oxidoreductase and glycinerich RNA-binding protein, etc. The results suggested that the mixed cDNA library from rice roots was successfully generated in high quality, and it may provide an essential resource for further stress-responsive gene cloning and functional study.

Loading Jiangxi Super rice Research and Development Center collaborators
Loading Jiangxi Super rice Research and Development Center collaborators