Studies The Key Technique And Criterion On Tomato Plug Seedlings

This study is derived from two projects, such as Jiangsu province agricultural technology renewal item "industrial techniques exploitation and extension of vegetable plugs seedlings in South Suzhou", Jiangsu province agriculture integrated extension science and technology item "industrial techniques extension and application of vegetable plugs seedlings". Using modern technology to collect information, on the base of experiments and demonstration, the studies on substrate comparison of tomato plugs seedlings and its application technique are performed.1. The physical-chemical characteristic of substrate and the effects of different substrate on growth of tomato were studied. The results showed that substrate made of reed residue, Chinese medical material residue, fungus residue, vinegar residue, straw can substitute for turf, vermiculite to some extent. The bulk density, porosity saturated moisture capacity and EC of substrate achieved the requirement of plugs seedlings. This substrate with abundant mineral nourishment, high organic content and good buffer function fit to seeding nursery, but the applied scope of the substrate to different crops should furthermore.2. The effects of nutrient supply from substrate on growth of tomato seedlings was studied. The results indicated that besides appropriate temperature, humidity and light, nutrient supply from substrate was the main technique measure for cultivating healthy seedlings. Especially the supply of N, P and K, would affect the growth of root and shoot, the accumulation of dry matter and the yield of tomato plant. The fertilization of P could make the seedlings vigorous and the increasing of plant height.3. The effects of the management of water on growth of tomato seedlings were studied. The results showed that there is a remarkable distinctness of tomato seedlings growth among different substrate moisture condition. Substrate moisture content 80%~90% was feasible in seeding nursery.4. The effects of seeding age on yield of tomato plant were studied. The results demonstrated that seeding age was correlative with the both side factors, one was the number of plugs and the supply of nutrient in per area, and seeding age could not too old, or else affect yield; another was the condition of culture, seedling age could appropriate old in winter or spring, contrarily in summer. If facilities condition was well, seedling grew in order, producer should plant the young seedling.5. The technical specification on plugs seedlings was studied. Through studying on filtrating plug stays and substrate, sowing seeds, soaking seeds, managing seeding and transporting came into being the technical criterion of tomato plugs seedlings.