|
In this paper, Cornaceae genus Cornus hair Lai pilot sites were established as a research object, Yangling, Shaanxi, Shandong Yiyuan, Lushi and Shanxi Yangcheng, to conduct a study on the biological characteristics of the hair Lai and shattering the law, and try to explore to improve its production measures. Phenology of observed objects of all sorts of places, and to take certain measures to improve fruit set, the following conclusions: 1, the result the rate sticks and 1 year old shoot length coefficient of variation of the largest 39% and 30% respectively, the magnitude of variation were 10% to 44% and 58 142cm, relative plant height, diameter at breast height, branching angle and then branches basal diameter, two traits large differences between different hair Lai, is conducive to breeding excellent high-yielding plants. Into the flowering stage, each result branches born 16 to 54 corymbose cyme inflorescence 3.44 to 5.59 cm the inflorescence diameter 4.8 to 12cm, each inflorescence 73 to 133 small white flowers, fruit diameter 6.0 ~ 7.53cm, seed diameter 4.52 ~ 5.54mm, pericarp thickness 0.46 ~ 1.30mm, hull thickness 0.74 ~ 0.96mm, the fruit was 2.63% and 13.70%, grain weight to 220g to 260g, Mao Lai monoclonal average annual yield up to 10 ~ 30kg. 3, through the various parts of Mao Lai period of fruit fresh and dry weight measurements, found in the June 23 to 29 and July 12 to 27 days, the fruit of these two time periods for the fresh weight growth peak, other time tends smooth; basic nuts and nut shell fresh weight stabilized; peel a steady increase in the fresh weight; from the point of view of the dry weight of the organic matter in the husk and shell in the sustained and rapid growth; nuts from June 23 to the 6th moisture accumulation period, from July 6 to August 13 organics massive accumulation period. 4, marked 73 trees from 2008 to 2010 for three consecutive years solid amount of observation, with A, B, C, D, E, respectively, represent the number of results is extremely complex, many medium, a small amount of results and not the results, adjacent to the two-year differential and total differential, T-test results for the total differential fruit quantity ≥ 4.52, the differences are significant at the 0.05 level. The results showed that 58.9% of the gross Lai for two consecutive years of strong amount significant differences exist, and may also explain, the size of the years of Mao Lai widespread. 5, Yangling, Shaanxi, Shandong Yiyuan cents Forest Farm, of Lushi County Tanghe and Shanxi Yangcheng Yokogawa tree farms in four districts Mao Lai habitats and phenology observation, basically the same latitude, hair The phenophase impact Lai is light and ventilation conditions in their habitats. Hair Lai phenological period is divided into two major stages, vegetative growth and reproductive growth stage. The vegetative phase phenological order of Shaanxi gt; Shandong gt; Shanxi gt; Henan reproductive stage phenological sequence of Shaanxi gt; Shanxi gt; Shandong gt; Henan. Although the start and end times of each of the four pilot districts phenological stages are inconsistent, but the germination period of the four regions, the budding stage, leaf expansion, flowering of the duration of basically the same, sustained 20 ~~ 30d, stone fruit maturity and shedding lasts 7 to 14d. Take artificial measures can effectively improve the yield of Mao Lai. 0.3% urea can improve the yield of 14.25%, and the effect is most stable, then mix with the girdling can enhance the effect of the fruit retention; kinds hormone treatment, 10mg / L gibberellin and 20 mg / L gibberellin and 40mg / L 2 improve fruit ,4-D effect is obvious, including 40mg / L 2,4-D increased by 112.96%. Shows, artificial take measures to effectively increase production and help the large-scale production of the hair Lai.
|