建好四大支柱　制种高产稳产──伏牛山区杂交籼稻制种高产经验

Set up Four Mainstays , Reach Stable High Yield-An Experience in Indica Hybrid Rice Seed Production of the Funiushan Mountaineous Region

利用“四支柱”理论总结分析伏牛山区杂交仙稻制种经验教训，制定高、稳、低制种技术，指导制种，获得大面积连年高产、稳产。

Nanzhao County,located to the south Of the Funiushan Mountains in the south western area of HenanProvince,is a transitional area for indica and japonica rices. The seed production of indica hybrid rice here used to be verylow(1. 125 t/hm￣2 on average).However,under the guidance of the 〃,Theory of Four Mainstays〃(i.e.,rational populationstructure of both seed and pollen parents,synchronization of flowering and anthesis,application of gibberellins and supple-mentary pollination)introduced in 1990,axet of standardized cuItural technique of a high and stable yield with less cost inthe seed nroduction of indica hvbrid ricehs been vVorked out on the basis of sutnlnary and analysis of the seed productionin the Funiushan Mountaineous Region for years. The application of this technique has made a great yield inerease in theseed production of the region with a common of 2.3～3.0 t/hm￣2 in recent years and the average yield up to 3. 37 t/hm￣2 in1995.