Abstract:

To understand the status quo of soil nutrients, irrigation water quality and pear fruit quality of Pinggu pear orchards in Beijing, the soil pH and mineral nutrient contents of 100 representative pear orchards, the quality of 1 irrigation water sample and the quality of 30 pear fruits were investigated and analyzed. The results show that the soil pH of Pinggu pear orchards is pH 5.99-7.72, the average value is pH 6.99, the content of soil organic matter, alkali-hydrolyzed N, available Fe and available Mn are relatively low, while the content of soil available P, available K and available Cu are relatively high. The pH of irrigation water is pH 7.90, and other water quality indexes are all up to standards. The single fruit weight, fruit hardness, soluble solid content, solid-acid ratio, and the content of N, P, K, Ca, Mg and Fe of Pinggu pear are higher than those of the reference values, and only the total acid content does not increase compared with the reference value. Therefore, it is suggest to ameliorate the orchard soil, adjust soil pH, pay attention to the application of organic fertilizer or bio-organic fertilizer, supplement nitrogen fertilizer and iron fertilizer, reduce the use of zinc fertilizer, properly adjust the pH of irrigation water, and strengthen the integrated management of soil, fertilizer, water and cultivation methods of pear orchards, so as to improve the quality of ‘Fojianxi’ pear of Pinggu.

Key words: pear orchard, soil nutrient, quality of irrigation water, pear fruit quality, investigation