不同播种方式对水稻产量的影响

Effect of Different Planting Methods on Rice Yield

为探讨机穴播、宽幅机条播、人工撒播3种不同的播种方式下水稻枝梗分化、退化的特点,以及对产量及其构成因素的影响。试验以早熟品种南粳9108为材料,设置3个处理,对其穗部性状进行了调查,干物重、产量及产量因素测定与分析。结果表明:机穴播的高峰苗数与最终苗数都低于机条播与人工撒播,但是茎蘖成穗率却高于另外2个处理;穗分化期至成熟期,机穴播的单茎干物质积累量高于机条播与人工撒播;增加了穗长、二次枝梗数,降低了枝梗退化率,使得穗粒数、结实率、千粒重均有不同程度的提升,从而最终提高产量。

In order to explorer the characteristics of branch differentiation and retrogress, and effects on yield and its form factors under different planting methods including mechanical direct seeding,mechanical line seeding and artifical seeding in rice. Using Nanjing 9108 as material ,three treatments were carried out to analyze panicle traits, dry weight, yield and its form factors. The results showed that, mechanical direct seeding treatment had lower peak tiller numbers and higher effective spikelet rate of tillering than mechanical line seeding and artifical seeding treatments ; From PI stage to MA stage,accumulation of dry matter weight under mechanical direct seeding treatment was highest in three treatments. In addition,with panicle length,the secondary branch numbers increasing,retrograded percentage of branches lowing,mechanical direct seeding treatment improved spikelet numbers per panicle, seed setting rate and 1000-seed weight in different degree, and finally increased grain yield.