CAJ | 학술논문

为了进一步提高水稻产量，以龙香稻2号为材料，研究不同的栽插密度和施氮量对龙香稻2号生长发育及产量结构的影响。结果表明：随着施氮肥量的增加，分蘖期、抽穗期和成熟期推迟1～2d。种植密度小处理比密度大处理生育期延迟2～4 d；密度和氮肥对水稻有效分蘖数有直接影响，低密度条件下（15．00万穴·hm‐2）适当施用氮肥可促进大量分蘖而提高有效分蘖；密度和氮肥对水稻产量的影响主要通过影响有效分蘖数和穗粒数实现；龙香稻2号的最佳氮肥和密度配比方案为：密度16．67万穴· hm‐2，尿素160 kg · hm‐2，产量为8001 kg·hm‐2。
위료진일보제고수도산량，이룡향도2호위재료，연구불동적재삽밀도화시담량대룡향도2호생장발육급산량결구적영향。결과표명：수착시담비량적증가，분얼기、추수기화성숙기추지1～2d。충식밀도소처리비밀도대처리생육기연지2～4 d；밀도화담비대수도유효분얼수유직접영향，저밀도조건하（15．00만혈·hm‐2）괄당시용담비가촉진대량분얼이제고유효분얼；밀도화담비대수도산량적영향주요통과영향유효분얼수화수립수실현；룡향도2호적최가담비화밀도배비방안위：밀도16．67만혈· hm‐2，뇨소160 kg · hm‐2，산량위8001 kg·hm‐2。
In order to further increase rice yield ,taking rice variety Longjing 2 as experimental material ,effect of different transplanting density and nitrogen amount on growth and yield of cold land Japonica rice were stud‐ied .The results showed that with increasing of nitrogen amount ,tillering stage ,heading stage ,mature stage de‐layed 1~2 d ,the growth stage of the treatment with low planting density delayed 2~4 d than treatment with high planting density .Highest number of effective tillers was found in treatment with 160 kg·hm‐2 nitrogen a‐mount under low transplanting density .Effects of transplanting density and nitrogen amount on rice yield pri‐marily by affecting the number of effective tillers and grain number .The regime for highest yield was density of 166 700 hole per hectare and suitable nitrogen application amount (160 kg·hm‐2 ) .Under this condition ,trans‐planting density and nitrogen amount interaction had significant positive effect on yield .