| In order to enrich vegetable species and supply of the market requirement in early winter and
winter, Brassica campesttris L.ssp.chinesis (L.) Makino var rosularis Tsen et Lee was introducted to Heze region.
This experiment was mainly to explore the effects of different seeding times on its agronomic characters, yield and
nutritive quality, the effects of different fertilization on its yield and nutritive quality, and the effects of different leaf
ages of transplantation on yield and slow seeding time. The result showed that as the seeding times delayed, plant
height, plant width, leaf length, leaf width, petiole length and yield of single plant showed a trend of declining initially
and then increasing, petiole width, leaf number and soluble sugar showed a trend of increasing initially followed by
declining, but, except soluble sugar, then again increasing, protein content showed a trend of declining, but Vc and
nitrate content had no obvious change rules. Yield and protein contents were significantly higher in August 25th and
September 5th than the other seeding times, the yields of single plant were 511.16 g, and 500.08 g, respectively, protein contents were 6.27 mg/g and 6.50 mg/g, respectively, nitrate contents were 342.87 mg/kg and 357.66 mg/
kg, respectively. Vc content was significantly higher in September 5th than the other seeding times, with its content
reaching 32.34 mg/100g. The treatments of organic fertilizer (O), organic fertilizer adding nitrogenous fertilizer (ON),
organic fertilizer adding compound fertilizer (OM) were significantly higher than CK (no fertilizer) in single plant yield,
soluble sugar content and protein content. The single plant yield and protein content of OM were the highest, reaching
520.15 g and 6.79 mg/g, respectively, but its nitrate content was significantly lower than ON. Seeding age of 6 to 8
leaves plant was shorter with 4 days, but had higher single plant yield, with 518.72 g and 519.06 g, respectively. From
comprehensive analysis of agronomic characters, yield and nutritive quality, it concluded that the best seeding time of
B. campesttris was from August 25th to September 5th in Heze. Organic fertilizer adding compound fertilizer was the
optimal fertilizer combination, and the optimal seeding age was 6 to 8 leaves age. |
