Investigation and Analysis on Soil Nutrients of Pear Orchard in Longkou City

Ma Shuangyan; Wang Chunna; Sun Mingde; Wu Yang; Tian Haiqing; Liu Songzhong

doi:10.14083/j.issn.1001-4942.2016.06.018

Abstract：Pear is one of the most important pomology industries in Longkou City.To know about the soil nutrient status in pear orchards is the premise of guiding high quality and high yield of pear and sustainable development of pear industry.The pH value and nutrient contents in samples of 0 ~20,20 ~40 cm and 40 ~60 cm soil layers from 15 typical pear orchards were investigated in Longkou City.The results showed that there were 12.5%,25.0% and 28.6% respectively for the 3 soil layers possessing the suitable pH value of 6.5 to 7.5,however,the remaining 87.5%,75.0% and 71.4% had lower pH value than 6.5.The soil or-ganic matter contents in most of the orchards were in deficient status,and the percentages were 25.0%, 62.5% and 100.0% respectively.There were 100.00%,87.50% and 71.43% for 3 soil layers possessing medium or higher total N content,and 75.00%,62.50% and 14.29% possessing medium or higher alkali -N content.Higher olsen -P (91.33 mg/kg)and avail -K (215.54 mg/kg)contents were determined in the 0 ~60 cm soil layer of pear orchards.Therefore,increasing organic fertilizer,reducing chemical fertilizer ap-plication,improving fertilizer application method and preventing soil acidification were the primary measures for soil nutrient management in pear orchards of Longkou City.