Abstract: In order to explore the relation of soil temperature and fertilizer utilization, and improve pepper productivity of anti-season. A field experiment was carried out to study the effects of soil temperature(no heating and heating) and different fertilizer treatments(no fertilizer(CK), conventional urea fertilizer(N60), conventional 40% urea fertilizer(N24)) on pepper growth, nutrient uptake and soil physico-chemical properties. The results showed that under no heating soil plots, plant dry weight, height, plant survival rate and yield increased inordinately under conventional urea fertilized treatments compared with CK, stronger level of increased was obtained under N60 treatment. Heating soil enhanced this promoted action and hold higher yield in N60 and N24 treatments with no significant difference. Soil heating increased the nutrient release with growth period, while a relative lower peak in flowering stage, it was possible that elevating soil temperature improved nutrient need and uptake. In fruit stage, alkali-hydrolyzable nitrogen content decreased under no heating condition, and increased under heating condition. Irrespective of soil temperatures, available phosphorus and potassium content showed increased trend with growth stage, higher content under CK treatment in fruit stage. It was possible more potassium and phosphate supplementation under nitrogen deficiency. Suitable warming soil temperature improved urease activity in most fertilizer treatments. Therefore, nutrient uptake and pepper yield can be mostly improved by soil heating compared with application of nitrogen fertilizer. It's favorable to obtain high fertilizer efficiency absorption and yield increase in protected vegetable.

Key words: Capsicum annuum L., Soil temperature, Fertilization mode, Growth, Available nutrient

CLC Number: 

• S641.3