浙江农林大学学报2011，Vol.28Issue(6)：845-849,5.
临安山核桃主产区土壤pH值和有效养分的时空变化
Temporal and spatial variation of soil pH and nutrient availability for Carya cathayensis orchards in Lin' an
摘要
Abstract
Carya cathayensis (Chinese hickory) is a popular nut food tree species in China. To examine soil pH and nutrient availability changes with growing seasons as well as variation in different C. cathayensis orchards established in limestone soils, a 1-year field monitoring study was conducted from March 2007 to March 2008. Surface soil samples were collected from 21 orchards in March (before sprouting), July (fruit enlargement) and September (fruit maturity), 2007, and in March (before sprouting), 2008, and soil pH, available nitrogen (N), available phosphorus (P), and available potassium (K) were analyzed. Results showed ranges of 4.6-8.2 for soil pH, 50.8-236.2 mg·kg-1 for available N, 0.5-40.6 mg·kg-1for available P, and 24.8-391.0 mg·kg-1 for available K. These large ranges for the results indicated that soil properties varied greatly between orchards and changed remarkably with growth seasons as well. Furthermore, over 40% of thesoils with pH below 6 and great higher soil available N than soil available P and soil available K in most of the soils indicated that acute soil acidification and imbalance of soil nutrients could be a problem due to long-term intensive management. Thus, there is an urgent need to optimize soil management of C. cathayensis orchards to improve soil conditions for sustainable production. [Ch, 5 tab. 14 ref.]关键词
土壤学/石灰岩土壤/土壤有效养分/土壤酸化/土壤养分平衡/山核桃Key words
soil science/ limestone soils/ soil available nutrients/ soil acidification/ soil nutrient balance/Carya cathayensis分类
农业科技引用本文复制引用
张春苗,张有珍,姚芳,张圆圆,窦春英,叶正钱,胡国良,黄坚钦..临安山核桃主产区土壤pH值和有效养分的时空变化[J].浙江农林大学学报,2011,28(6):845-849,5.基金项目
浙江省科学技术重点项目(2007C12023) （2007C12023）
浙江农林大学科学研究发展基金资助项目(2005FR053) （2005FR053）
