|Author:||Huang, WenJiang ; Wang, JiHua ; Huang, Yide ; Zhao,ChunJiang|
|Book Group Author:||NA|
Cultivation of upland rice is an important strategy for rice production in water resource limited areas. However, it is wondered whether or not paddy rice varieties can be cultivated in upland field. In the present study, a variety of paddy rice (Oryza sativa L. cv. Shanyou 63) was cultivated in upland conditions with or without plastic film mulching and the physiological characteristics were examined. The stem and root of upland cultivated rice adapted to the environment in morphological and anatomical structures. As compared with paddy field, the upland cultivation resulted in a higher specific leaf weight and a higher root respiration. There was no significant difference between upland and paddy field in leaf photosynthetic rate and respiration rate, but leaf water use efficiency (WUE), photosynthetic CO2 fixation relative to transpiration water loss, was higher in upland rice than that in paddy rice. The leaf area index (LAI) in mulched upland cultivation reached a level similar to that of paddy rice but LAI in unmulched upland cultivation was lower than that of paddy control. The trends of LAI were similar to those of grain yield. Upland cultivation with plastic mulch resulted in a yield similar to the paddy control but the grain yield was lower if without mulch. Therefore, plastic mulching was important in upland rice cultivation for grain yield and the LAI was more important than leaf photosynthesis in physiology for grain yield formation of rice.
crop yield, leaf area index, mulching, photosynthesis, plantwater relations, plastic film, respiration, respiration rate, rice,roots, transpiration, upland rice, water use efficiency, China, Oryza,Oryza sativa, East Asia, Asia, Developing Countries, Oryza, Poaceae,Cyperales, monocotyledons, angiosperms, Spermatophyta, plants,eukaryotes, carbon assimilation, carbon dioxide fixation, LAI, paddy,Field Crops (FF005) (New March 2000), Plant Physiology and Biochemistry(FF060), Plant Water Relations (FF062), Plant Production (FF100)