Effects Of East-west Cultivation On Growth And Yield Of Facility Tomato At Different Densities

In order to explore the production mode of facility tomato with light weight,high quality and high efficiency,and the effect of new fertilizers on the quality,yield and root growth of facility tomato.This experiment did not follow the traditional north-south cultivation,but adopted the east-west ridge suitable for mechanized operation,and was carried out in hancun he agricultural technology promotion center,fangshan district,Beijing from march to July,2019.The experiment adopted random block group design,studied the influence of four kinds of bottom fertilizer treatment under different densities on nutrient regulation and agronomic indexes of tomato,and analyzed the influence of time and space change of east-west cultivation on tomato growth under different densities,so as to explore differentiated management and cultivation mode in greenhouse and other facilities.The results show that:（1）under the condition of dense planting,the maximum tomato yield treated with T（compound fertilizer 17-17-17）was 145 t·hm^-2.Under the condition of thin planting,the maximum yield of tomato treated with T（compound fertilizer 17-17-17）was 127 t·hm^-2.Under the condition of dense planting,there was no significant difference in tomato quality under different fertilization treatments,but under the condition of sparse planting,there was significant difference in tomato quality under different fertilization treatments.Under the two densities,the partial productivity and absorption utilization rate of nitrogen fertilizer under T treatment were the highest,and the effects of T treatment on root length,root surface area and root volume were the most balanced.Since the nutrient supply of T treatment lasted longer,it was beneficial to the nutrient absorption of tomato plants,and the yield was the highest under the two planting densities.Based on the comparison of all aspects,in this experiment,T treatment can promote the balanced growth of tomato roots in all aspects to achieve the regulation of nutrient absorption and the improvement of tomato quality and yield.（2）from the perspective of time,the planting density of 4400plants·666.7m^-2had a large increase in yield in the early stage,and the quality of tomato was not affected by the increase in density.Spatially,the northernmost plot of the greenhouse has the lowest yield compared with the other three plots under the two densities.In addition,the quality of tomatoes in the south plot was better than that in the north plot,but the quality difference between the four plots was not significant.Compared with the traditional north-south cultivation,the south side is limited by the height of space,so the yield is very small.By adopting east-west cultivation,the maximum potential of light and temperature is brought into full play on the south and north side of the greenhouse,and the increase of production,income and labor are realized.In this experiment,the use of dense planting in east-west direction can significantly increase the yield,increase the early yield and increase the income.The root system is regulated by nitrogen fertilizer to promote the individual yield increase.The application of compound fertilizer with slow-release effect is a better choice.