不同直播栽培方式对水稻产量及其构成的影响

Effects of Different Direct Seeding Cultivation Methods on Rice Yield and Its Composition

摘要:

通过对15个水稻品种(系)在保墒旱直播、播后上水两种直播栽培方式下的比较试验,研究其茎蘖消长、产量及构成之间的差异。结果表明,各参试材料的株高在播后上水条件下最高,其次是插秧,保墒旱直播株高最低,分蘖表现为插秧栽培方式下明显高于播后上水和保墒旱直播;穗数、穗长、穗粒数在播后上水和保墒旱直播方式下明显高于插秧对照的有8份,结实率和千粒重在保墒旱直播栽培条件下最高,其次是插秧方式,播后上水栽培方式下最低;与插秧对照相比,除宁粳38、宁粳49、181外其余参试材料产量在播后上水和保墒旱直播下表现较低。

Abstract:

Through the comparative experiment of 15 rice varieties（lines） under the two direct seeding cultivation methods of dry direct seeding with soil moisture conservation and water supply after sowing, the differences of tiller growth and decline, yield and composition were studied. The results showed that the plant height of the tested materials was the highest under the condition of water supply after sowing, followed by transplanting, and the plant height of dry direct seeding with moisture conservation was the lowest. The tillering performance of transplanting cultivation mode was significantly higher than that of water supply after sowing and dry direct seeding with moisture conservation.The number of panicles, ear length and grains per panicle were significantly higher than those of transplanting control in water supply and soil moisture conservation dry direct seeding after sowing. The seed setting rate and1 000 grain weight were the highest under the condition of soil moisture conservation and dry direct seeding, followed by the transplanting method, and the lowest under the above water cultivation mode after sowing. Compared with the control, except for Ningjing 38, Ningjing 49 and 181, the yield of other tested materials was lower under the condition of water supply after sowing and direct seeding with moisture conservation.