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以汕优63为对照,研究不同栽插密度和施氮量处理丰优香占群体生长发育特性。结果表明:与汕优63相比,丰优香占在不同栽插密度和施氮量条件下,成熟期总干物重高、齐穗至成熟期净光合产物多、增产显著,表明丰优香占具有稻谷高产的物质基础,对栽插密度和施氮量适应范围宽。丰优香占在不同栽插密度和施氮量试验中,以密度为30万穴.hm-2、施氮量为187.5 kg.hm-22个处理的产量最高,齐穗至成熟期净光合产物、成熟期叶面积指数、齐穗后25 d剑叶叶绿素含量和光合速率等指标也有相同趋势。合理密植,适宜的施氮量,可以确保丰优香占创造合理的群体,取得较多穗数和较高干物质积累,从而提高生物学产量和稻谷产量。
Taking Shanyou 63 as control, the effects of different transplanting density and nitrogen application rate on growth and development of Fengyouxiang were studied. The results showed that compared with Shanyou 63, Fengyouxiang had higher total dry matter weight at maturity and more net photosynthetic products from heading to maturity, with significant increase in yield, indicating that Fengyuoxiang accounted for the highest yield of rice Basis, planting density and nitrogen to adapt to a wide range. Fengyouxiang was planted at different planting density and nitrogen application rate, with the highest density of 300000.hm-2 and the highest nitrogen level of 187.5kg.hm-22, the highest yield of net photosynthetic products from heading to maturity The leaf area index, chlorophyll content and photosynthetic rate of flag leaf at 25 d after heading stage all showed the same trend. Reasonable and close planting, appropriate amount of nitrogen application, can ensure that Feng You Xiang accounting for the creation of a reasonable population, obtain more spikes and higher dry matter accumulation, thereby enhancing the biological yield and rice yield.