【摘要】 通过多年的小区试验和示范研究 ,观测闽单 88物候期、主要农艺性状、生育动态、不同群体结构的叶面积系数 (L AI)和叶片净同化率 (NAR)、干物质积累和产量性状、需肥特性等。结果表明 ,闽单 88在福建的生育期春季为 94～ 98d,秋季为 86～ 90 d;从拔节至抽雄需要 2 5～ 30 d,这时期雌雄穗分化与营养体旺盛生长并进 ,是栽培关键阶段 ;该品种适宜间套作或单作密植栽培 ,高产群体密度为 6 .75～ 7.5 0万株· hm- 2 ,L AI为 3.74～4.0 4,NAR为 9.37～ 9.38g· m- 2· d- 1 ;在中等地力水平下 ,应选用纯氮 15 0～ 187.5 kg· hm- 2的施氮量 ,科学经济施肥方法是基肥∶拔节肥∶穗肥 =3∶ 3∶ 4,追肥采用平稳追肥法。更多还原

【Abstract】 Plot experiments and demonstration in recent years were carried out to study the phenophase, main agronomic character, growth dynamics, the changes of leaf area index (LAI)and net assimilation rate(NAR),accumulation of dry matter and yield characteristics for Mindan 88 in different spacing and fertilizing conditions. The results showed that phenophase of Mindan 88 was 86-98 days in autumn or 94-98 days in spring in Fujian, it need 25-30 days from stem pushing to head sprouting staminate,female ear differentiation and vegetation growth were exuberant in this period. The population density for high yield was 67 5-75 0 ten thousand plants per hectare, the LAI was 3 74-4 04 and the NAR was 9 37-9 38 g·m -2 ·d -1 . Application of 150-187 5 kg N per ha. was necessary in medium fertility of soil. The ratio of basal fertilizer,stem pushing fertilizer and ear fertilizer was 3∶3∶4.更多还原