【摘要】 以超级杂交水稻甬优6号为试材,研究不同氮肥用量(纯N 180、225、270、315 kg/hm2)和移栽密度(19.5万、22.5万、25.5万、28.5万、31.5万苗/hm2)对晚稻生长和产量的影响。结果表明:最高茎蘖数随施氮量或移栽密度的增加而增加;成穗率随施氮量的增加而先增后降,随移栽密度的增加而下降;产量随施氮量和移栽密度的增加先增后降;施氮量与移栽密度交互作用对产量及主要性状有显著影响。在施氮量为270 kg/hm2、移栽密度为25.5万苗/hm2的试验条件下比较有利于甬优6号增产。更多还原

【Abstract】 In the late season,a field experiment was conducted with different transplanting densities(19.5×104,22.5×104,25.5×104,28.5×104,31.5×104 hills/hm2) and nitrogen fertilizer rates(180,225,270,315 kg/hm2 N) by using a super high yielding indica rice,Yongyou 6 as material.Results showed that the maximum tiller number increased with the nitrogen fertilizer rate or transplanting density increase.The panicle forming rate was first increased and then decreased with the nitrogen fertilizer rate increase,while the panicle forming rate decreased significantly with the transplanting density increase.Meanwhile,improving nitrogen fertilizer rate or improving transplanting density increased rice yield,but as over-fertilizer or density,rice yield decreased.The results also indicated that there was interaction significantly between nitrogen fertilizer application rates and transplanting densities on the yield components and grain yield of rice.In the present study,the highest yield was recorded in the treatment with 270 kg/hm2 nitrogen fertilizer and 25.5×104 hills/hm2 transplanting density.更多还原