|Author:||Qin, JiangTao ; Hu, Feng ; Li, HuiXin ; Wang, YiPing ; Huang, FaQuan ; Huang, HuaXiang|
|Book Group Author:||NA|
Field experiments were conducted in Jiangxi, China, in 2003, to study water use efficiency and agronomic traits in rice cv. Zhongxuan 10 cultivated in flooded and non-flooded soils with and without straw mulching. The total amount of water used by rice under flooded cultivation (FC) was 2.42 and 3.31 times as much as that by rice under the non-flooded cultivation with and without straw mulching, respectively. The average water seepage was 13 560 m3/ha under flooded cultivation, 4750 m3/ha under non-flooded cultivation without straw mulching (ZM) and 4680 m3/ha under non-flooded cultivation with straw mulching (SM). The evapotranspiration in the SM treatment was only 38.2 and 63.6% of the FC and ZM treatments, respectively. Compared to the ZM treatment, straw mulching significantly increased leaf area per plant, main root length, gross root length and root dry weight per rice plant. The highest grain yield under the SM treatment (6747 kg/ha) was close to rice cultivated in flooded soil (6 811.5 kg/ha). However, the yield under the ZM treatment (4716 kg/ha) was much lower than that under the FS and SM treatments. The order of water use efficiency and irrigation water use efficiency were both as follows: SM > ZM > FC.
|Pages:||59 - 66|
agronomic characteristics, crop yield, evapotranspiration,leaf area, leaves, mulching, plant water relations, rice, roots, strawmulches, water use efficiency, China, Jiangxi, Oryza, Oryza sativa,Oryza, Poaceae, Cyperales, monocotyledons, angiosperms, Spermatophyta,plants, eukaryotes, East Asia, Asia, Developing Countries, EasternChina, China, Kiangsi, paddy, Field Crops (FF005) (New March 2000),Plant Water Relations (FF062), Plant Production (FF100), Soil Management(JJ900)