Abstract:

To understand the effect of shrimp peptide organic fertilizer on quality improving of Shatian pomelo fruit and its reasonable application technique, from 2013 to 2015, the effects of applying shrimp organic fertilizer on orchard soil nutrients and fruit quality of Shatian pomelo were studied in Rongxian County. Shallow ditch was opened near the canopy drip line in the middle and late July. Treatment 1 was 3.5 kg shrimp peptide fertilizer of per plant, treatment 2 was 2.5 kg shrimp peptide fertilizer of per plant, the control was 2.5 kg dry peanut bran of per plant. From August to September, plants of treatment 1 and treatment 2 were sprayed three times with 800 times of shrimp peptide amino acid foliar fertilizer, and the control was sprayed with water. The results showed that the application of shrimp peptide fertilizer could increase the content of exchange Mg, effective Zn, effective Fe, effective Mn and effective B in shallow soil of 0-20 cm, and increase total N, exchange Ca, exchange Mg, effective Fe, organic matter and pH in soil of 20-40 cm. The contents of nutrients such as total N, total P, total K, exchanged Mg and effective B in the leaves were significantly improved. The total sugar content of the fruit was obviously improved, and the flavor was good, the taste was sweet and crisp, and the quality of the fruit was better. Therefore, the application amount of shrimp peptide fertilizer of 2.5-3.5 kg in the middle of July with spraying 800 times of shrimp peptide amino acid foliar fertilizer in August for three times could effectively improve the soil nutrients and the quality of Shatian pomelo fruits.

Key words: shrimp peptide organic fertilizer, shrimp peptide amino acid, peanut bran, Shatian pomelo, leaf, soil, nutrients, fruit quality