Objective The study investigated the effects of different solanaceous vegetable straws on the nutrient absorption of peach seedlings.

Method A pot experiment was conducted to figure out the effects of four solanaceous vegetable straws on eggplant (Solanum melongena), tomato (Solanum lycopersicum), potato (Solanum tuberosum) and pepper (Capsicum annuum) straw on nutrient absorption of peach (Prunus davidiana) seedlings.

Result The biomass of the roots and above-ground parts of peach seedlings treated with eggplant straw increased by 8.33% and 17.36% compared with the control. The other four straw treatments had no significant effect on the biomass of peach seedlings. The pepper straw treatment increased the total nitrogen content of peach seedlings, and the total nitrogen content of the roots and aboveground parts increased by 5.64% and 13.63% compared with the control. The other three straw treatments had no significant effect on the total nitrogen content of peach seedlings. The phosphorus transport ability of peach seedlings treated with potato straw was the highest, and the total phosphorus content in the root system and aboveground parts increased by 26.45% and 34.68% compared with the control. The remaining three straw treatments reduced the total phosphorus content of the peach seedlings or had no significant effect. All four straw treatments could increase the total potassium content of peach seedlings. The pepper straw treatment improved the nitrogen, phosphorus and potassium absorption and transport capacity of peach seedlings to a certain extent, while the other three straw treatments only promoted the absorption and transport capacity of a certain element.

Conclusion All four types of solanaceous vegetable straws could promote the absorption and transport of nutrients by peach seedlings to a certain extent, among which pepper straw had the best effect.