Effects of manure types on sugars and acids content and flavor of pear （ Pyrus pyrifolia cv. Hwangkumbae）

Abstract：In this study, field experiment was carried out to investigate firmness and soluble solid concen- tration （SSC）, and different types of sugar and acid in Hwangkumbae pear after various types of manure application. In the first and second years, fruit SSC of treatments compost manure ＋ amino acid foliage fertilizer and mature animal waste compost was significantly higher than CK. Total sugar and fructose con- tent of all the treatments were increased significantly in the first year, however, in the second, only in the two treatments （compost manure ＋ amino acid foliage fertilizer and mature animal waste compost）, total sugar, fructose and glucose content of the two treatments of were enhanced. Moreover, content of total acid, tartaric acid, malic acid, citric acid and succinic acid was decreased and fruit flavor was improved after various types of manure application. It could be concluded that field grown Hwangkumbae pear ap- plying compost manure ＋ amino acid foliage fertilizer or mature animal waste compost could increase sugar content, decrease organic acids, enhance flavor and improve quality. Its effects could be continued more than two years after one application.