Effects of Distiller's Grain Substrate with Acid Regulation on the Growth of Tobacco Seedlings in Floating Breeding System

In order to reduce the use of peat resources and realize the sustainable development of tobacco, the pH of distiller s grain substrate was adjusted with humic acid, and the effects of various distiller s grain substrates on the growth of tobacco seedlings were studied to find out the method of cultivating high-quality tobacco seedlings by using distiller s grain substrate. The results showed that when 60% of humic acid was added to the distiller s grain substrate made from coarse distiller s grains, fine distiller s grains, perlite and vermiculite, both the pH and electrical conductivity decreased significantly and were similar to that of the conventional substrate. Moreover, the emergence rate of tobacco seedlings, the rate of strong tobacco seedlings, leaf number, stem height, root growth and quality of tobacco seedlings were good.

Key Techniques of Industrial Seedling for Anthurium andraeanum

[Objective] The aim was to study the techniques for the tissue culture,rapid propagation and transplantation of Anthurium andraeanum.[Method] The leaf,leaf stalk,spathe and spadix of the pot flower variety and cut flower variety of A.andraeanum were used as explants,in order to investigate the influences of the explants selection,disinfection conditions and different media on the callus induction,proliferation and rooting.[Result] The leaf stalk of A.andraeanum was the optimum explant,with the highest callus induction rate（78.3%）.The best disinfecting effect could be obtained when the explants was sterilized with 0.1% HgCl2 for 8 min.The optimum media for the callus induction of Ping Champion and MIDORI were respectively 1/2 MS＋1.50 mg/L 6-BA＋0.50 mg/L 2,4-D＋0.10 mg/L NAA and 1/2 MS＋1.50 mg/L 6-BA＋1.00 mg/L KT＋0.10 mg/L 2,4-D,while the optimum media for callus subculture of Ping Champion and MIDORI were respectively MS＋1.00 mg/L 6-BA＋0.50 mg/L NAA＋0.30 mg/L 2,4-D and MS＋0.50 mg/L 6-BA＋0.50 mg/L KT＋0.10 mg/L NAA.It was beneficial for the proliferation and growth of cluster buds while 10%（w/v）of coconut water or banana jam was added to MS medium at the proliferation stage,and the proliferation rate could be increased by 2.83 fold.At the rooting stage,the medium 1/2 MS＋0.10 mg/L NAA＋0.10 mg/L IAA was the optimum medium for rooting,and the rooting rate was up to 100%.[Conservation] The research results will lay a foundation for the establishment of the industrial seedling breeding system of A.andraeanum,and it will be significant for the development of A.andraeanum industry.

Establishment of Three Breeding System of Virus-free Strawberry Plantlet in Infantry Regiment of the Twelve Division

Shoot-tip culture of strawberry is the most important way to get virus-free plants.Moreover,detoxification and rapid propagation are the key techniques for producing high-quality seeds and seedlings massively and rapidly and achieving the high-quality,high-yield and high-efficiency development of strawberry industry.We have recently produced virus-free strawberry seedlings by combing tissue culture technology and stolon-reproduction method and this technology has been widely used.In addition,a relatively perfect three breeding system of virus-free strawberry seedlings was established after production practices,guaranteeing the supply of high-quality seeds and seedlings and technical support for strawberry industry in corps.

Key Techniques of Stereoscopic and Efficient Cultivation of Strawberry in Southern Xinjiang

Strawberry is rich in nutrition,which is the only fresh fruit in winter in southern Xinjiang,with good prospect of stereoscopic cultivation.In this paper,the key techniques such as stereoscopic cultivation pattern,the combination of different modes,the substrate of strawberry cultivation,the drip irrigation system,the formula of nutrient solution,the selection of varieties,the propagation of seed and seedling,the induction of flower buds,the planting and management of plants,and the green control of diseases and insect pests are introduced,and greenhouse space and solar energy are fully used to maximize the economic and social benefits of strawberry farming combined with tourism.The results will further promote the quality and efficiency of strawberry industry in southern Xinjiang,and provide a reference for strawberry growers.