| In this paper, Huashuang No.5 and Huaza No. 9 were mainly used to study different ratio of base and topdressing effect on the growth and development process of the rapeseed, dry matter accumulation and distribution, physiological and biochemical metabolism, quality, economical characters of rapeseed. The results were as follows:The impact on growth and development process of the rapeseed:Before early flowering, plant height and root collar (stem) diameter were larger with 8:2 and 6:4 processing, while 4:6 and 2:8 processing larger before harvest. 10:0 processing showed inhibition. 0:10 processing was always the lowest. The impact on the total number of leaves with basal application was different with non-basal application (0:10); Too much basal application (10:0) was not the best early days.Nitrogen can increase the number of green leaves obviously.The impact on dry matter accumulation and distribution of rapeseedPlant dry weight gradually increased. All used for basal application inhibit thegrowth of rapeseed. In harvest, 6:4 processing was the highest (66.114g), while 0:10 the lowest (40.865g). The dry matter weight of pods, seeds and percarp gradually increased with the process. In the beginning seeds weight was lower than pericarp, Finally, seeds weight caught up with even exceeded pericarp.More basal application in winter root weight proportion was lower. During bolting period, the leaves content with 10:0 processing was highest (more than 50%), while root weight proportion highest with 0:10 processing. In flowering, root weight proportion dropped first and then increased with the increase in basal proportion, while stem and leaves just the opposite. In harvest, root and stem weight ratio reduced with the decrease of basal proportion, while pod weight proportion increased rapidly.The impact on physiology and biochemistry metabolism of rapeseedChlorophyll content of functional leaves was higher with the increase of basal proportion (early days) and topdressing (5, March). During pod development period, seed chlorophyll content increased first and then decreased, while chlorophyll content pericarp of decreased gradually.Soluble sugar content of functional leaves was lower with the increase of basal proportion (early days) and topdressing (before harvest). Soluble sugar of pericarp gradually transferred to seeds on 25 (2007-2008) and 34 days after flowering (2006-2007).Before January 15 the total nitrogen of functional leaves ranged from 5-7%, and increased with higher proportion of the basal. Low temperature led a sharp decline, a drop of 20-50%, After January 30, the total nitrogen of functional leaves increased due to bolting and flowering of rapeseed..C / N of Functional leaves ranged from 1.0-3.0 (winter)→6.0-9.0 (low temperature)→4.0-6.0 (bolting)→1.0-2.0 (before harvest). Grain: 2.0-2 .5→1.0-1.5→0.5-0.7. C / N of pericarp of Huashuang No.5 ranged from 1.5-1 .6→2.5-3.0→2.0-2.5. Higher than 3.0 in C / N was bad for pod development.The ABA, ZR, GA and IAA content were higher with the increase of the basal in winter. During January 15 to January 30, low temperature led a rise in ABA and IAA content, while decline in ZR and GA content. ABA content of leaves achieved a higher lever in bolting with the increase of topdressing. ZR and GA content reached a higher level in the early flowering. With the increase ratio of topdressing, ZR, GA and IAA content of functional leaves increased.The impact on the quality of rapeseedIn harvest, oil content dropped with an increase in the ratio of topdressing, while increased in protein content. The total glucosinolate content showed no significant discipline due to varieties of factors.All used for basal and topdressing varied in oil and protein content, Differences in 2006-2007 were larger than 2007-2008. Grain protein and oil content increased gradually during pod development, and higher proportion of topdressing accompanied with higher protein content. Pericarp protein accumulation decreased. The impact on the yield and economical characters of rapeseedWith the increase in the ratio of topdressing. the yield of rapeseed increased firstand then decreased. 6:4 processing achieved the maximum, 2500.13 kg / ha for Huashaung No.3. 2677.22 kg / ha for Huashuang No.5, 3134.96kg / ha for Huaza No.9, but the difference between the treatments was not significant.With the increase in the ratio of topdressing, plant height, stem diameter, length of main inflorescence, the numbers of effective branches increased first and then decreased. The location of the branches on the stem rose.With the increase in the ratio of topdressing, The numbers of the effective pods,the numbers of seeds in one pod, biomass, economic output and economic indexes increased first and then decreased. The weight of one thousand seeds changed a little. The numbers of seeds in one pod changed a little. Differences in biomass and economic output were larger. Pot experiment was different with field experiment.
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