Status and Outlook of High Yielding Cultivation Researches on China Super Hybrid Rice
ZOU Ying-bin, ZHOU Shang-you, TANG Qi-yuan(College of Plant Science and Technology, Hunan Agricultural University, Changsha 410128, China)
This paper summarizes the results of high yielding cultivation researches on super hybrid rice in recent years. The yield of China super hybrid rice can reached to 12 t/ha as the single rice in one year under different ecological condition in the south of China. The growth duration is 130—150 d, spikelet number is 5.5—6.0 ×104/m2, LAI is 9—10, plant height is 100—110 cm. It has stronger tillering ability, which shows the potential yield of adequate panicle number and large panicles, coordination between sink and source, fertilizer tolerant and lodging resistance. Through systematic researches of growth and development, dry matter production, tillering ability, root activity, optimum locations and seasons, high yielding path and the technique system for super hybrid rice, the physiological basis of high yielding formation, cultivation environments and agronomy techniques under the cultivation conditions of single seedling and sparse planting and increase in nitrogen fertilizer is recognized. In order to exploit the high yielding potential of super hybrid rice, it is necessary to further conduct the experimental studies of the coordination between the adequate panicle number and large panicles and their grain filling percentage in the aspects of enzyme, hormone, and even molecular level, as well as the optimization of SRI intensive cultivation techniques.