Effects of organic fertilizer replacing nitrogen on tomato yield,quality and water fertilizer effects in greenhouse under nitrogen fertilizer reduc-tion
ZHANG Yang
ZHANG Rong
XU Tingting
Abstract：Fenteyou tomato was used as experimental material,a field experiment was conducted to study the effects of or-ganic fertilizer replacing nitrogen on tomato yield、quality、water fertilizer effects in greenhouse.The results showed that conventional fertilization with 40％nitrogen reduction plus organic fertilizer replacing 40％nitrogen treatment had the highest yield,but there was no significant difference with conventional fertilization treatment.The soluble sugar and vita-min C content were significantly higher than that of conventional fertilization treatment.Soil water content of 0-20 cm soil layer was higher than that of conventional fertilization treatment,and with the increase of organic fertilizer replacing nitrogen,the soil water content showed an increasing trend.The absorption of nitrogen,phosphorus and potassium by to-mato is potassium＞nitrogen＞phosphorus,and the absorption ratio is N∶P∶K=1∶0.30∶1.24.The treatment of convention-al fertilization with 40％nitrogen reduction plus organic fertilizer replacing 40％nitrogen has the highest absorption of ni-trogen,phosphorus and potassium,which is significantly higher than that of conventional fertilization.Compared with conventional fertilization,fertilizer contribution rate increased 16.22 percentage points,and agronomic effiiciency in-creased by 8.92 kg·kg-1.In conclusion,conventional fertilization with 40％nitrogen reduction plus organic fertilizer re-placing 40％nitrogen(N 162 kg·hm-2+P2O5 246 kg·hm-2+K2O 417 kg·hm-2+organic fertilizer 5400 kg·hm-2)is the best fertilization mode for tomato in greenhouse in eastern region of Qinghai province.
Keywords：TomatoNitrogen fertilizer reductionOrganic fertilizer instead of nitrogen FertilizerYieldWater fertilizer effects
Publication Date：2023-12-05
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 93-99 )