The new high-quality indica rice variety Yuexiangzhan has the characteristic of a high harvest index

Yuexiangzhan is a "high harvest index type" conventional high-quality rice newly bred by the Rice Breeding High-Tech Research Laboratory of the Rice Research Institute of the Guangdong Academy of Agricultural Sciences. This variety passed the conventional regional trials for the early crop in 1996 and 1997 and the mixed regional trials of conventional early indica rice and hybrid rice in the South China rice region in 1997 and 1998. In February 1998, it passed the provincial variety approval of Guangdong Province for crop varieties. It has now become the control variety for the early-crop high-quality grain regional trial in Guangdong Province, a key variety promoted throughout the province, and has been included in a promotion project of the Ministry of Agriculture. Yuexiangzhan is a dual-purpose variety for both early and late crops. Its growth period for the early crop in Guangzhou is 125 days, and its growth period for the late crop is 110 days. The plant height is about 90 cm, the effective panicles per mu are about 230,000, the seed-setting rate is above 90 percent, the harvest index can reach as high as 0.619, and the 1000-grain weight is 19 grams. It is first-grade rice for the early crop, and the cooked rice has a faint delicate fragrance. This variety has strong field resistance to rice blast, moderate resistance to bacterial leaf blight and rice planthopper, and also shows relatively good resistance to bacterial leaf streak and tarsonemid mites, but it has the phenomenon of panicle tip degeneration. Yuexiangzhan has strong tillering ability, is suitable for transplanting with small seedlings, and is also suitable for seedling throwing and direct seeding. For cultivation, fertilizer and water management for the early crop can refer to that of generally medium-maturing high-quality grain rice, and for the late crop can refer to that of early-maturing high-quality grain rice. Implement early application of green-returning fertilizer, heavy application of tillering fertilizer, and moderate application of differentiation fertilizer, quickly build up the plant framework, increase growth, and increase the number of effective panicles to achieve high yield.