Scientia Agricultura Sinica ›› 2013, Vol. 46 ›› Issue (18): 3850-3856.doi: 10.3864/j.issn.0578-1752.2013.18.014

• HORTICULTURE • Previous Articles     Next Articles

Effects of Organic Fertilizer and Biochar on Root System and Microbial Functional Diversity of Malus hupehensis Rehd.

 CHEN  Wei-1, ZHOU  Bo-3, SHU  Huai-Rui-2   

  1. 1.College of Food Science and Engineering, Shandong Agricultural University, Tai’an 271018, Shandong
    2.College of Horticulture Science and Engineerin, Shandong Agricultural University, Taian 271018
    3.College of Life Science, Shandong Agricultural University, Taian 271018, Shandong
  • Received:2013-06-24 Online:2013-09-15 Published:2013-07-08

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Abstract: 【Objective】 Effects of organic fertilizer and biochar on root system and microbial functional diversity in soil planted with the biennial seedling Malus hupehensis Rehd were studied. Meanwhile, the effect of increasing soil carbon on soil quality and plants were evaluated to provide a theoretical basis for sustainable development of orchard. 【Method】The biennial seedlings of M. hupehensis Rehd was planted in a pot experiment. The root system of plants and microbial functional diversity were analyzed by adding different amounts of organic fertilizer and biochar【Result】The quantity and area of fine absorbing root, the population of bacteria in soil and rhizosphere, the FDA enzyme activity and the microbial functional diversity were improved by application of organic fertilizer or biochar, and combined application of both were proved to be even more effective. Biochar was predominant in increasing area of fine absorbing root, while disadvantaged in improving microbial functional diversity, compared with organic fertilizer. The area of fine absorbing root in 10% organic fertilizer and 6% biochar, 10% organic fertilizer and 3% biochar, 10% organic fertilizer, 6% biochar and 3% biochar was 6.6,10, 2.5, 3.3 and 3.1 times than that of CK.The population of bacteria, actinomycetes and fungi in soil of treatments were 3.32-10.23, 1.2-1.97 and 3.24-5.26 times as much as the control group. The largest amount of rhizosphere actinomycetes was obtained after application of organic fertilizer, while application of 3% rhizosphere biochar corresponded to the largest amount of rhizosphere fungi. 【Conclusion】The root system of plants and microbial functional diversity in soil can be improved by increasing soil carbon, which is beneficial to soil fertilizer and sustainable development of agriculture.

Key words: Malus hupehensis(Pamp. ) Rehd. , biochar , organic fertilizer , root , microbial functional diversity

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