›› 2017, Vol. 29 ›› Issue (12): 2084-2090.DOI: 10.3969/j.issn.1004-1524.2017.12.17

• Environmental Science • Previous Articles     Next Articles

Effects of corn-apple rotation on enzyme activity and pH value in rhizosphere soil of apple trees

FAN Linjuan1, LIU Qizhi1, *, WANG He2, XU Zhenxiang1, LI Weihua1   

  1. 1. College of Plant Protection, China Agricultural University, Beijing 100193, China;
    2. Forest Protection Station of Beijing's Garden Afforestation, Beijing 100029, China
  • Received:2017-04-11 Online:2017-12-20 Published:2018-01-08

Abstract: In order to clarify the functional mechanism for alleviating the apple continuous cropping obstacles under corn-apple rotation system,the impact of corn plantation years (1 a or 2 a) on rhizosphere soil enzyme activities and pH value of continuous cropping apple orchards were studied. Rhizosphere soil of apple orchard in flowering stage, fruitlet stage, expanding stage and maturity stage was collected, respectively. It was shown that rhizosphere soil urease activity, phosphatase activity, invertase activity and soil pH value all showed a trend of non-continuous cropping of apple>corn (2 a)-apple rotation>corn (1 a)-apple rotation>continuous cropping of apple in all tested apple growth stages. Compared with apple continuous cropping, rhizosphere soil urease activity in the treatment of corn (2 a)-apple rotation and corn (1 a)-apple rotation increased the most in the maturity stage, which were 105.95% and 78.30%, respectively. The activity of soil phosphatase in the treatment of corn (2 a)-apple rotation and corn (1 a)-apple rotation was significantly increased by 26.45% and 23.06%, respectively, in fruitlet stage, and by 37.07% and 29.19%, respectively, in expanding stage, and by 45.59% and 18.77%, respectively, in maturity stage. The activity of soil invertase increased the most in expanding stage, reaching 53.11% and 47.29%, respectively. Meanwhile, compared with apple continuous cropping, of which pH value was 6.86, the rhizosphere soil pH in corn (2 a)-apple rotation and corn (1 a)-apple rotation was increased to 7.57 and 7.25, respectively. In summary, apple continuous cropping reduced soil enzyme activities and pH value, yet corn-apple rotation could remarkably increase soil enzyme activities and pH value. Corn (2 a)-apple rotation had better alleviation effect than that of corn (1 a)-apple rotation on obstacles of apple continuous cropping.

Key words: rotation, continuous cropping obstacle, soil enzyme, rhizosphere

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