献改优63高产栽培研究

1988～1989年在兴化市对杂交水稻献改优63栽培特性、群体发展、净光合强度、灌浆速率和植株状况进行了分析研究。结果表明,产量构成因素中,每穗总粒数对产量的作用最大、每亩穗数其次,结实率第三,千粒重最小。高产的理想株型呈“腰鼓形”。结果还表明,该品种基部节间大维管束的截面积、穗型,叶面积指数大,叶积、净光合速率、干物质生产率高,有一定的生产潜力。但该品种结实率不稳。多效唑对调节株型和库-源关系有一定的作用。本文提出了一条中期早控、后期稳促、主攻大穗、增加每亩总颖花量的高产栽培途径。

HIGH YIELD CULTIVATION OF XIANGAIYOU 63 (O. SATIVA L. SUBSP HSIEN TING)

Xiangaiyou 63 (O.sativa L.subsp hsien Ting) is a new hybrid variety of rice.The culture characters, population development, net photosynthetic rates, grain ripening rates and plant characteristics were determined and studied.The results showed that, of the four yield-forming factors, the effect of number of grains per panicle was the most important, number of panicles per mu the second, percentage of fertile grains the third and weight of 1000 grains the fourth.The ideal type of plant for high yield looked like the form of waist drum.It was also showed that the variety had larger transection area for the macro-vascular bundles in the base internode, larger panicle, larger leaf area index, larger leaf area duration, higher net photosyntheic rate, higher dry matter productivity and had certain yield producing potental.But the variety was unstable in percentage of fertile grains.Multiple effect triazole (MET) had some effects on plant type and sink-source relation.An approach to high yield cultivation by means of earlier control at the mid-growth period, stable promotion at the late-growth period, striving for larger panicles and increase of total number of grains per mu was put forward.