不同播期对机插稻武运粳27号产量、品质影响的试验研究

Effect of Sowing Date on Yield and Quality of Mechanical Transplanting Rice of Wuyunjing 27

试验研究播期对麦茬机插稻武运粳27号产量的影响,探讨不同播期条件下机插稻产量形成特征、干物质积累特性。结果表明,随播期推迟,机插稻武运粳27号实收产量显著下降,糙米产量、精米产量、整精米产量及精米蛋白质产量呈下降趋势。早播处理的穗数、每穗颖花数、结实率均显著高于晚播处理,千粒重差异不显著。受播期推迟的影响,抽穗期、成熟期干物质积累量与拔节-抽穗期、抽穗-成熟期干物质积累量及比例呈明显下降趋势,拔节期前干物质积累量及比例则升高。收获指数随播期推迟而下降。因此,稻麦两熟地区,机插稻武运粳27号早播可实现高产量,为稳定实现9.0 t/hm2以上的产量,最晚应在6月10日之前播种,并配套科学高产栽培措施。

The objectives of this study are to illuminate the effect of sowing date on yield and quality of mechanical transplanting rice of Wuyunjing 27, and elucidate the traits of formation of yield and dry matter accumulation. Results showed that the delayed sowing date significantly reduced the yield of grain, brown rice, milled rice, head rice and protein in milled rice of mechanical transplanting rice of Wuyunjing 27. The panicle number per hectare, spikelet number per panicle and filled grains percentage of rice in treatment of earlier sowing date were higher than those in treatment of later sowing date, respectively, while no obvious differences in filled grain weight were detected among treatments. With the delayed sowing date, the dry matter accumulations at heading stage and maturity stage and during jointing to heading stage and heading to maturity stage were obviously reduced, while the dry matter accumulations before jointing stage were increased. In addition the harvest index was dropped with the postponed sowing date. Thus, bringing forward the suitable sowing date of mechanical transplanting rice of Wuyunjing 27 in rice-wheat rotation system could realize the high rice yield. In order to produce at least 9.0 t/hm2 grain yield,rice should be sowed before June 10 th with scientific high-yield management carried out during rice growing stage.