Comparison of rice yield, grain quality and some physiological parameters as affected by cultivation techniques
2014
Zhaowen Mo | Jianxin Wu | Jinyuan Tian | Qingshan Lin | Yijun Jiang | Meiyang Duan | Shenggang Pan | Hua Tian | Xiangru Tang
Field experiments were conducted in 2010 and 2011 to compare the yield, grain quality and some physiological parameters of five super inbred rice varieties as affected cultivation techniques. Grain yield, yield components, grain quality, and physiological parameters [leaf net photosynthentic rate (Pn), leaf relative chlorophyll content (SPAD value), granule-bound starch synthase (GBSS) activity and grain soluble starch synthase (SSS) activity] were measured. Both cultivation and variety significantly affected the grain yield in 2010 and 2011. The cultivation technique of integrated use of seedling-strengthening agent, super rice special fertilizers and rice quality promoter (CI) significantly increased rice yield by 16.92 - 21.73% compared to the cultivation technique of local farmer management (CL). The significant increase in yield due to CI may be attributed to increase in number of panicle and seed setting rate and enhancement of some physiological parameters. The CI significantly increased brown rice rate, milled rice rate and head rice rate by 0.36 - 0.57%, 1.74 - 1.81% and 4.41 - 11.48% respectively, due to higher leaf net photosynthetic rate (pn), leaf relative chlorophyll content (SPAD value), granule-bond starch synthase (GBSS) activity and grain soluble starch synthase (SSS) activity) during grain formation stage. Thus the increase in grain yield and quality is associated with yield component and some physiological parameters. This work highlights the positive impact of the cultivation technique using seedling-strengthening agent, super rice special fertilizers and rice quality promoter (CI) on the grain yield and grain quality of super inbred rice.
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