期刊论文

STANDARDIZATIONAL CULTIVATION OF RAPESEEDS——EFFECT OF FERTILIZER AMOUNT, SEEDLING AGE, NITROGEN TOP APPLICATION ON SEED YIELD AND NET OUTPUT VALUE

中文

湖南农业大学学报(自然科学版)

1007-1032

1991

03

441-446

10.13331/j.cnki.jhau.1991.03.003

本校为第一机构

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:P2O5:K2O=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...