The Study On Suitable Irrigation Regime Mode Of Spring And Summer Crop Tomato In Greenhouse

The text carried the study on Suitable Irrigation Regime mode of spring and summer crop tomato in the greenhouse, which belongs to Water Conservancy Institute comprehensive experimental base of Shenyang Agricultural University. In this paper, three kinds of water-saving micro-irrigation techniques were adopted respectively including the means of drip, subsurface, small tube irrigation. It studied comparatively in its experiment the effect of soil moisture in different irrigation methods on the growth, quantity, quality and water use efficiency of tomatoes in the greenhouse. We analyzed the influence of soil water on crop growth, quantity and quality by calculating its variance, besides, we studied the relation among irrigation water amount, quantity and quality of tomatoes by using the grey relational analysis method, and we identified the Crop water sensitive period. And in order to obtain the better suitable regime of tomatoes with high-yield, high-quality, water-saving, the principal component analysis is used to conduct a comprehensive evaluation of three indexes (quantity, quality and water use efficiency). Finally, this paper presented the suitable regimes of tomato respectively under drip irrigation, small tube irrigation and subsurface irrigation, and the best irrigation mode of them in greenhouse is shown as follows: 1. In different water handling rooms, the change of the height of the tomatoesand the diameter of its stem was in accordance with each other. The tomatoes grew slowly in its prophase, and then it came to a rapid growth. At last, its growth rate flattened. However, the difference in its way of irrigation and water handling room was quite obvious. With three water-saving irrigation methods, the growth of tomato was the best in subsurface irrigation, and which in drip irrigation was better than small tube irrigation.2. In these three ways of irrigation, Vitamin C accumulated most in the way of seepage irrigation. The content of organic acids and soluble sugar reached the highest when water flew out of the small pipe. The ratio of sugar to acid was the highest under the seepage irrigation condition. With the same way of irrigation, the water deficit in a appropriate way was beneficial to improve the fruit quality in its flowering period and its prime period of fruiting.3. The yield and quality (Vc) of tomatoes under different irrigation methods were most closely related with the irrigation water amount in the period of flowering and fruiting, followed by seedling period.4. Sil moisture had a significant effect on the growing, quantity, and quality of tomatoes with different irrigation methods. In the entire growth stage of tomatoes , it was better to begin to water tomatoes holding high yields when soil moisture was near 60-70% field, which could get a higher yield.5. Suitable irrigation regime of tomatoes with different irrigation methods in the greenhouse.(1) The suitable irrigation regime of tomatoes for small tube irrigation was 450 mm water for the whole growth period, 45 mm twice in seeding stage, 40 mm for three times in flowering and fruiting stage, 50mm for three times in grandly fruiting stage, 30 mm for three times in late fruiting stage.(2) The suitable irrigation regime of tomatoes for drip irrigation was 400 mm water for the whole growth period, 35 mm twice in seeding stage, 40 mm for three times in flowering and fruiting stage, 40mm for three times in grandly fruiting stage, 30 mm for three times in late fruiting stag.(3) The suitable irrigation regime of tomatoes for subsurface irrigation was 380 mm water for the whole growth period, 25 mm twice in seeding stage, 40 mm for three times in flowering and fruiting stage, 40mm for three times in grandly fruiting stage, 30 mm for three times in late fruiting stage.6. The best irrigation mode of tomatoesThe best irrigation mode of tomatoes was 380 mm water for the whole growth period, 25 mm twice in seeding stage, 40 mm for three times in flowering and fruiting stage, 40mm for three times in grandly fruiting stag, 30 mm for three times in late fruiting stage. Irrigation method was subsurface irrigation.