Effects of nitrogen application on growth,yield and quality of tomato with culture in pot
In order to investigate the effects of nitrogen on growth indices as well as yield quality of tomato,a pot experi-ment was used to analyse the effects of different nitrogen application rates on growth indexes,quality and yield of tomato under the substrate of Lycium barbarum branches.In this experiment,five nitrogen level treatments were set up through wolfberry branch substrate cultivation,namely CK(applying nitrogen 0 g·plant-1),N1(applying nitrogen 2.5 g·plant-1),N2(applying nitrogen 5.0 g·plant-1),N3(applying nitrogen 7.5 g·plant-1)and N4(applying nitrogen 10 g·plant-1).CK without N application was used as a control in a randomised block design,while it was sampled for the determination of relevant indexes.The results showed that compared with the CK,all the N application treatments increased the plant height.Under N3 treatment,the yield of tomato reached the maximum at different ear and fruit stages,which increased by 48.47%,30.00%,125.66% and 46.41%,respectively,compared with CK.Nitrogen application also significantly increased total acid,soluble sugar,soluble solids and vitamin C content in tomato,but suppressed lycopene content.However,after the amount of nitrogen fertilizer reached a certain level,the increase of tomato-related indexes gradually decreased,and even decreased.Therefore,proper nitrogen application can promote the growth and development of tomato,while exces-sive nitrogen application will lead to excessive vegetative growth of tomato,inhibit plant reproductive growth and reduce tomato yield,among which N3(nitrogen application of 7.5 g·plant-1)is the best treatment.
TomatoCulture in potNitrogen fertilizerWolfberry branch substrateGrowthYieldQuality
万方数据
维普
