Study On Fertilization Effect On Tomato In Organic Substrate Culture In Solar Greenhouse

This experiment used Xiuli tomato as the experiment material. Thecomposition of organic substrates was vermiculite and sheep manure at a ratioof 2:1. The winter tomato were planted in self-made simple grooves.According to the previous data that the absorption of nitrogen was 60% of thatapplied, phosphorus 30% and potassium 70%, there were four treatments inthis study: Treatment 1 the fertilization amount=(the fertilize amount ofneeded for desire output-fertilization on content of quick-acting nutrients inorganic substrates) / nutrients uptake ratio; Treatment 2, the fertilizationamount (1.5* the fertilize amount needed for desire output-fertilization oncontent of quick-acting nutrients in organic substrates) / nutrients uptake radio;Treatment 3, the fertilization amount (2* the fertilize amount needed for desireoutput-fertilization on content of quick-acting nutrients in organic substrates)/ nutrients uptake radio; Treatment 4, supplied with organize substrate onlyand without fertilizer supply. The indexes of growth, physiologicalcharacteristics, yield and quality nutrition absorption and distribution in wintertomato with organic substrate culture were studied. All of these supplieddependable basis of theory and index of technology to production of tomato inorganic substrate culture. 1. The fertilization had no influence on the growth of the tomato. Theheights, number of leaves and stem diameter of tomato had no significantdifference among the different treatments. 2. The photosynthetic rate of tomato leaves treated with optimal fertilizerwas higher than that without fertilizer supply. During the initial fruiting stage,the photosynthetic rate of tomato leaves increased with fertilization increase.During the prosperous fruiting stage the photosynthetic rate of tomato leaves 3李建勇:日光温室有机基质型无土栽培番茄的施肥效应 in treatment 2 was the highest. The diurnal variation of photosynthetic rate oftomato was single-peak curve, no significant "nap"of leaves during the lastfruiting stage. During the prosperous fruiting stage, chlorophyll (a+b) contentof tomato leaves increased with fertilization increase, activity of the tomatoroots treated with optimal fertilizer was higher than treated without fertilizersupply, nitrate reductase activity in treatment 2 was the highest, treatment 3was the lowest. 3. The yield of the tomato could be increased obviously with properfertilizer application. The yield treated with fertilizer was higher than that withno fertilizer supplication. 4. The quality of the fruit of tomato cultured with organic substrates andproper fertilizer could be improved. The soluble sugar, soluble protein andorganic acid in the fruit of treatment 3 were the highest. The content of vitaminC in the fruit of treatment 2 was the highest. But fertilizer application couldincrease the content of nitrate. 5. Proper fertilizer application would promote absorption of the nutritionorgan. The more fertilizer applied, the more absorption of N, P and K. 6. The utilization rate of the fertilizer could be increased with properfertilizer application. The utilization rate of N and K in substrates wasdescended with fertilization increase, but the utilization rate of P increasedwith fertilization increase. 7. The best fertilization scheme is treatment 2 in winter tomato withorganic substrates soilless culture. 8. The requirement of N, P and K were 2.31kg,0.683kg,3.952kg kg perproducing 1000kg tomato respectively The absorptance of N, P and K was1:0.296:1.712.