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生态学杂志 ›› 1997, Vol. ›› Issue (6): 6-11.

• 研究报告 • 上一篇    下一篇

柑桔园生草栽培的生态效应研究

李国怀, 章文才, 刘继红, 胡德文   

  1. 华中农业大学园艺系, 武汉430070
  • 收稿日期:1996-09-09 出版日期:1997-12-10

Studies of Ecological Effects of Sod Culture in Citrus Orchard

Li Guohuai, Zhang Wencai, Liu Jihong, Hu Dewen   

  1. Department of Horticulture, Huazhong Agricultural University, Wuhan 430070
  • Received:1996-09-09 Online:1997-12-10

关键词: 分蘖洋葱, 根系分泌物, 黄瓜, 根际土壤微生物

Abstract: The experiments to study the ecological effects of sod culture on satsuma (Citrus unshiu Marc.cv. Ramei) were carried out in citrus orchard in 1993-1995. White clover (Trifolium repens L.)and bahia grass (Paspal umnotatum Flugge) were planted as sods, they were cut to cover the soil in summer and used as basic manure in winter.The treatments were as follows: (1) Clean cultivation (CK), (2) White clover,(3) Mixture of white clover and bahia grass, (4) Bahia grass. The studies showed sod culture resulted in decrease of temperature of soil and air in the tree canopy and increase of soil water content and the air realtive humidity under drought conditions. After 3-year sod culture, the soil organic matter, hydrolytic N, effective P,K,Fe,Cu and Zn were increased in comparison with clean cultivation. Leaf N and Fe content of citrus trees in treatment No.2, and leaf P and K in treatment No.3, 4 were also increased . From July to October,the leaf photosynthetic rate of citrus trees in sod plot was raised. Furthermore,the sod culture was effective to increase the percentage of fruit set and yield by reducing the abnormal fruit drop during the unusual temperature and drought period.

Key words: Chinese onion, root exudates, cucumber, rhizosphere soil microorganism.