Characteristics of dry matter accumulation and distribution in three different rice cultivars, i.e. three-line hybrid rice Shanyou 63, two-line hybrid rice Liangyou 2186 and traditional rice IR 64, were studied in experimental farm of Fujian Agriculture and Forestry University, Fuzhou China in 2003. The results showed that the three rice cultivars performanced the same trends in the accumulation of dry matter, and no significant difference was found in all entries throughout all developmental stages. The amounts of accumulated dry matter in Shanyou 63, Liangyou 2186 and IR64 were 2074.13 g/m2, 1976.10 g/m2 and 1924.14 g/m2 at yellow mature stage, respectively, showing no significant different among them, then went down to 1926.38 g/m2, 1933.80 g/m2 and 1842.30 g/m2 at fully grain-maturing stage, accompanying with 7.12%, 2.63% and 4.25% consumed amounts of total dry matter accumulated at yellow maturing stage during full mature stage for Shanyou 63, Liangyou 2186 and IR64, which were considered to be related to higher respiration and natural plant aging. The community growth rate(CGR) of Shanyou 63 and IR64 peaked at full tilling stage, indicating 52.13 g/(m2?d) and 44.26 g/(m2?d) respectively, and Liangyou 2186 peaked at early heading stage with a value of 45.15 g/(m2?d). The CGR of the three rice cultivars changed in different developmental stage showed in the order: Early heading stage(Full heading stage)>Grain filling stage >Yellow maturing stage>Full tilling stage>Early tilling stage. Moreover, the rates of dry matter partitioning to the sink of grain in Shanyou 63, Liangyou 2186 and IR 64 were 47.94%, 41.14% and 45.69% respectively, of which about 46.87%, 24.98% and 34.41% dry matter stored in leaf, stem, shealth and root were translocated to grain sink in the process of grain filling. In view of translocation and partitioning coefficients of dry matter to grain, Shanyou 63（three-line hybrid rice）was much more advantageous over Liangyou 2186 (two-line hybrid rice) and IR 64 (traditional rice). In addition, the regression for dry matter accumulation over the rice growing and developing course showed that it could be fit by cubic equation better than that by Logistic equation, with R2 > 0.99 for any of the three rice cultivars.
Key words
Rice;Dry matter;Accumulation;Partition;Community growth rate(CGR);Model
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References
1Yang Huijie, Li yizhen, Yang Rencui, et al. Dry matter production characteristics of super high yielding rice. Chinese Journal of Rice Science, 2001, 15(4): 265~270
2Jiang Ligeng, Gan Xiuqin, Wei Shanqing, et al. Accumulation pattern of dry matter, nitrogen, phosphorus,potassium and silicon in rice genotypes and their relationships. Chin J Appl Ecol.,2004,15(4): 226~230
3Guo Yuchun, Lin Wenxiong, Liang Yiyuan, et al. Physioecological studies on dry matter production and yield formation in new planttype (NPT) rice. Dry matter production and grain-filling characteristics in NPTrice. Journal of Fujian Agriculture and Forestry University(Natural Science Edition), 2001, 30 (1):9~15
4Cheng Wangda, Zhang Guoping, Zhao Guoping, et al. Differences in accumulation and translocation of the nutrients and dry matter between dry and paddy cultures of rice cultivar Jia-Zao 935. Acta Agronomica Sinica, 2003, 29(3): 413~418
5Hu Jichao, Jiang Dong, Cao Weixing, et al.,Effect of short-term drought on leaf water potential, photosynthesis and dry matter partitioning in paddy rice. Chinese Journal of Applied Ecology. 2004,15(1):63~67
6Y. San-oh, Y. Mano, T. Ookawa, T. Hirasawa. Comparison of dry matter production and associated characteristics between direct-sown and transplanted rice plants in a submerged paddy field and relationships to planting patterns. Field Crops Research 2004,87: 43~58
7Peng Shizhang, Li Rongchao, Zhu Chengli. Dry matter growth model for paddy in water-saving irrigation. .Journal of Hydraulic Engineering, 2002,11: 99~102
8Zhong Xuhua, Peng Shaobing, John E.S, et al. Relationship between productive tiller percentage and biomass accumulation in rice (Oryza sativa L.): A simulation approach. Chinese Journal of Rice Science, 2001, 15 (2):107~112
9Xie Hua-an, Wang Wu-qi, Yang Hui-jie, et al. The characteristics of super high-yielding hybrid rice. Fujian Journal of Agricultural Sciences. 2003,18(4):201~204
10Liang Kangjing, Lin Wenxiong, Wang Xueren, et al., Studies on developmental genetics of the culm-sheath dry matter weight in three-line Indica hybrid rice. Acta Acta Agronomica Sinica, 2003, 29(2): 274~279
11Shi Kun, Hao Shufeng, Xie Hongtu, et.al.. Effects of applying nitrogen fertilizer at different stages in ploughed furrow on dry matter production and yield of rice. Chin J Appl Ecol., 2002,13(12):1579~1581
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