榆杂29的高产栽培技术初探

High-yielding Cultural Technique for Hybrid Rice Yuza 29

榆杂２９为云南农业大学新育成的粳型高产组合，在云南部分地区４ａ来的试验示范结果表明，在海拔１２００～１８００ｍ为最适宜种植地区；其高产栽培技术是：适期早播，是高产的重要环节，稀播适龄壮秧，秧龄５０ｄ，同时早栽、浅栽，基本苗随海拔升高达到４５～７５（万／ｈｍ２），采用宽窄行栽培方式；以肥水促控保证群体结构优化，提高成穗率、结实率；注重后期肥水管理，以养根保叶，提高粒重。可达到有效穗４０５万／ｈｍ２，单产１１．２５ｔ／ｈｍ２。

Based on the experiments and investi gations of large-scale production of the japonica hybrid comtination Yuza 29 for 4 years in some parts of Yunnan Province, it was found that to obtain a high yield (>11.25 t/hm 2) in the culture of Yuza 29, more attention should be paid to: ① seeding at a suitable time and in a sparse pattern to raise suitable age (about 50 days) and vigorous seedlings; ② early and shallow transplanting at a suitable space (alternated wide rows with narrow rows); ③ well-managing fertilizer and water in early growth stage for a fine population structure and in late stage to maintain the vigor of roots and leaves for a heavier grain weight (>25 g 1 000-grain weight); ④ raising panicle bearing rate and seed set rate to ensure sufficient panicles (>375 millions/hm 2) big panicles (>120 filled spikelets/panicle).