Technology Of Simplified And Labor Saving Seedling Of Tobacco

The main links of the tobacco are plating and sowing, seedling management, hardening and transplanting.The actual production costs are high, labor-intensive, time consuming. In this study, the seedling process as a line of research, for the existing problems in the seedling links, doing the research of technology of simplified and labor saving seedling of tobacco, carried out the seedling tray the best seedlings hole volume and seedling density, chemical regulation hardening seedlings technology, analysed automation planting, sowing, covered one machine operating results, established a rapid, quantitative evaluation index of strong seedlings of tobacco, the main findings are as follows:(1)The study on the best seedlings hole volume and seedling density of the seedling tray. The simplified and labor saving seedling purposes to reduce seedlings hole volume, to reduce the seedling substrate usage, reduce the cost of seedling,meanwhile, studied the best seedling density of the unit seedling area. The results showed that:seedlings hole volume31.25cm3, seedling density160/tray seedling tray, tobacco seedlings developed root system, robust, the occurrence of the disease is low, compared to the conventional seedling tray,reducing the amount of1500cm3seedling substrate, reducing the cost of1.15yuan, increasing1.95yuan economic efficiency.(2)Analysis on automation planting, sowing, covered one machine operating results. From the combination of agronomy and agricultural point of view, analysis on automation planting, sowing, covered one machine operating results. The results showed that:the automated plating, sowing, covered one machine substrate filling quality, sowing precision, less labor, low labor costs, high production efficiency and daily production capacity of3840tray, effective solution to labor-intensive, time-consuming and labor issues of the plating, sowing links of the tobacco seedling.(3)The study on chemical regulation hardening seedlings technology. Through several control regulation hardening measures compared with conventional hardening seedlings measures, screening one or several chemical regulation hardening seedlings measures to replace the conventional hardening seedlings measures. The results showed that:spraying0.2mg/L Brassinolide can significantly improve stress resistance of tobacco seedlings,enhanced antioxidant capacity, especially, tobacco seedlings transplanted to the field survival high, tobacco roots developed, high photosynthetic efficiency,robust, flue-cured tobacco leaf high quality, good economic returns, reduced the labor intensity of the seedling, saved labor costs, solved the problem of hiring huge volume of employees and hardening seedlings a long time of conventional hardening seedlings.(4)The study on rapid, quantitative evaluation index of strong seedlings of tobacco. Based on the traditional strong seedlings standard, determined17quality indicators, the use of fuzzy comprehensive evaluation method to calculate the comprehensive evaluation index of the quality of tobacco seedlings, and designed two kinds of vigorous seedling index, namely relative index (two single quality index ratio) and composite index (3and3above single quality index consisted), and by using correlation analysis method finding out typical strong seedling index, established a rapid, quantitative evaluation index of strong seedlings of tobacco. The results shows:The comprehensive evaluation indexes range of tobacco seedlings quality is [0.26～0.80].The range can roundly summarizes tobacco seedlings quality, quantificationally、objectively evaluating the quality of tobacco seedlings.; The individual index and relative index contains informations less, can not roundly summarize tobacco seedlings quality. However, composite index constituted by multiple agronomic characters is stable, and roundly summarizes tobacco seedlings quality, and correlation coefficient of [(stem girth/plant height) X total fresh weight X10] composite index with comprehensive evaluation indexes is maximum, can be used as the strong seedling index of evaluating tobacco seedlings quality. The field experiments shows, when the numerical range takes28.57～37.05,the tobacco seedlings quality indexes reach maximum value,tobacco seedlings survive quikly and survive rate high after transplanting, the comprehensive quality of tobacco plants is good in the growth period of tobacco, the chemical quality of the flue-cured leaves is good.