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本试验对浙江省双季早晚稻的6个当家品种,在幼穗形成期用肥、光、温3种不同生态条件,研究它们对产量及其构成因索和生长发育的影响。结果表明:穗肥、遮光和迟栽均使早晚稻产量明显降低。增施穗肥使结实率下降,千粒重变小;遮光使所有产量构成因素均显著变劣;迟栽水稻结实率低,千粒重小。穗肥不影响抽穗时期,遮光使晚稻抽穗时期推迟,早晚稻都表现早栽早抽穗、迟栽迟抽穗。穗肥、遮光和迟栽对后期分蘖、叶面积、植株干重、叶绿素含量和主茎出叶数也有不同的影响,本文分析了它们与产量形成的关系。
In this experiment, six different varieties of early and late rice in double cropping season in Zhejiang Province were used to study the effects of fertilization, light and temperature on the yield, composition, growth and development of panicle during panicle formation. The results showed that the yield of early and late rice decreased obviously with panicle fertilizer, shading and late planting. Increasing the panicle fertility reduced the seed setting rate and reduced the 1000-grain weight. Shading made all yield components significantly worse. The grain-filling rate of late-planted rice was low and the grain weight was small. Panicle does not affect the heading period, shading delayed late heading stage of rice, early and late rice are early heading early indications, delayed late heading. Panicle fertilizer, shading and late planting also had different effects on late tillering, leaf area, dry weight of plant, chlorophyll content and number of main stem leaves, and their relationship with yield formation was analyzed in this paper.