Suitability of Composted Maize Straw and Mineral Nitrogen Fertilizer for Tomato Production

摘要

The use of organic fertilizer may increase yield of tomato and reduce dependence on synthetic fertilizer. Field studies were conducted to determine the effect of maize straw (MS) compost with and without mixing with inorganic nitrogen fertilizer (Nmin) on the growth, productivity and nutrient uptake of tomato (Lycopersicon esculentum Mill.). The treatments were 4 and 6 Mt-ha~(-1) of MS compost and 30 and 60 kg-ha~(-1) of Nmin fertilizer. Controls with no compost (0 Mt-ha~(-1)) or Nmin fertilizer (0 kg-ha~(-1)), or Nmin only were included. Applications of MS compost and Nmin enhanced plant growth and were more effective than the control treatment. Plant height, number of flowers and fruit produced per plant and plant dry matter yield were all improved significantly by application of MS compost alone or in combination with Nmin. Yields and yield components indicated that the crop had a better response to application of compost, but less to Nmin. The combined application of 4 Mt-ha^1 of MS compost andNmin fertilizer at 30 kg-ha~(-1) produced better plant growth and fruit yield than other combinations.