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本试验采用双因素随机区组设计,研究了3个氮肥施用量(160 kg/hm2、320 kg/hm2和480 kg/hm2)对风抗78和金秋理想2个大白菜品种生长及产量的影响。结果表明:氮肥用量对大白菜株高、株幅、叶球纵径、叶球横径和根重有显著影响,对外叶长、外叶宽、中肋长、中肋厚无显著影响。株高、株幅、中肋厚、根重随施氮量的增加而增加,而外叶长、外叶宽、中肋长、叶球纵径、叶球横径随施氮量的增加呈现先增大后减小的趋势。氮肥影响大白菜产量,随着施氮量的增加,其叶球质量、单株总质量、单产呈增加趋势,且差异显著。6个处理中,风抗78在氮肥施用量为480 kg/hm2时产量最高,为83 928.57 kg/hm2,其次为风抗78施用320 kg/hm2氮肥,产量为77 926.20 kg/hm2,且二者之间差异不显著。
In this study, two-factor randomized block design was used to study the effects of three nitrogen fertilizer rates (160 kg / hm2, 320 kg / hm2 and 480 kg / hm2) on the growth and yield of two Chinese cabbage varieties, . The results showed that nitrogen application had significant effects on the plant height, plant width, vertical length of leaf spheres, transverse diameter and root weight of Chinese cabbage, but had no significant effect on the length of outer leaves, outer leaves, midrib length and mid-fin thickness. The plant height, plant width, middle rib thickness and root weight increased with the increase of nitrogen rate, while the length of outer leaves, outer leaves, length of middle rib, vertical length of leaf spheres and diameter of leaf sphere increased with the increase of nitrogen rate First increase and then decrease the trend. Nitrogen fertilizer affected the yield of Chinese cabbage. With the increase of nitrogen application rate, the leaf mass, total plant mass and yield per plant increased with the increase of nitrogen application rate, and the difference was significant. Among the six treatments, Fengkai 78 had the highest yield of nitrogen fertilizer at the rate of 480 kg / hm2 with 83 928.57 kg / hm2, followed by Fengkai 78 with 320 kg / hm2 nitrogen fertilizer at the yield of 77 926.20 kg / hm2, There was no significant difference between the two groups.