Abstract:

In order to improve the cultural techniques, definitude the relationship between the different seedling ages of plantation and its production and quality, strengthen the competitiveness of broccoli industry, we carried out the correlation studies of seedling age of plantation and its seedling quality, reproductive stage, commercial and production in Broccoli, and constructed the related regression mathematical models to provide the technical basis for cultivation of top quality and high production of broccoli. The results were as follow: with the increase of seedling age of plantation, the individual growth potential and biomass also increased, while the numbers of sound seedling showed a “few-many-few” characteristic. Meanwhile the vegetative stage, the curd and whole reproductive stage were longer and displayed a linear change trend. In addition, the bud density of curd, the rate of commercial curd and the production of curd displayed a “low-high-low” curve movement. The best seedling age of plantation of broccoli was 35-40 d, which could give consideration to both the high-quality and high-yield. By the analysis of the experiment results, the curve model between the different seedling age of plantation (d) and the sound seedling index (p), the linear models between seedling age of plantation (d) and the vegetative stage (e), the curd reproductive stage (f), the whole reproductive stage (g), the relational models between the different seedling age of plantation (d) and the bud density of curd (x), the rate of commercial curd (u), the production of curd (y) were built as follow: p=-0.0004d2+0.035d-0.3952, e=1.52d+40.66, f=0.3143d+24.714, g=1.8343x+65.381, x=-0.0901d2+6.4756d-41.614, u=-0.1037d2+7.5757d-46.929, y=-40.497d2+3089d-31257. We believed that rational use of these change laws and mathematical models would provide an opportunity to improve safe, excellence cultivation of broccoli efficiently.