摘要
以湘油11号为材料,采用三因素五水平正交旋转组合设计,微机模拟,发现施肥量、苗龄、氮素追肥比例对油菜秧苗素质、产最构成、产量及净产值都在不同程度上存在着显著影响,而且施肥量与氮素追肥比例之间存在互作,产量在2250kg/ha以上的最佳农艺措施组合是每公顷施纯氮249～255kg(N:P_2O_5:K_2O=1:0.5:0.5),苗龄31～32d,氮素追肥占施用氮肥赠量的45.5％～49.7％;净产值3000/ha以上的综合农艺措施是施纯氮70.5 kg/ha(三要素比例同上),苗龄27.8d,氮素追肥比42％。
Experiments designed in orthogonal rotation combination of three factors and five levels with rape (CV. Xiang You 11, B.napus) showed that fertilizer amount, seedling age, N top application affect the quality of seedlings, seed yield and its components and net OUtpUt value. The optimal combination of agronomic measures for good yield (more than 2250 kg/ha)and net output value is: N 249～255kg/ha (N:P_2O_5:K_2O=1:0.5:0.5), seedling age 31～32 days, top application of N 45.5%～49.7% of the total N amount. The Systematic agronomic measures for net OUtpUt value over 3000 per hectare are:N 70.5kg/ha (The ratio of the 3 factors is the same as above), seedling age 27.8 days, N top application 42% of the total.
关键词
油菜
栽培
氮肥
施肥
产量
苗龄
Brassica spp
cultivate
nitrongenous fertilizer
fertilizing
yieled/seedling age
