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Journal of Desert Research ›› 2020, Vol. 40 ›› Issue (5): 169-179.DOI: 10.7522/j.issn.1000-694X.2020.00069

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Alleviating obstacles of continuous cropping in Lanzhou lily by soil fumigation combined with microbial fertilizer

Lipeng Zhang1(), Guiying Shi1(), Guihong Shi1, Yanlin Yu1, Mouqiang Li2, Guoli Su1, Xixia Jia1   

  1. 1.College of Horticulture,Gansu Agricultural University,Lanzhou 730070,China
    2.Agricultural Technology Extension Station of Longmen Town,Lintao County,Lintao 730500,Gausu,China
  • Received:2020-03-22 Revised:2020-07-13 Online:2020-09-28 Published:2020-09-28
  • Contact: Guiying Shi

Abstract:

This experiment studied the effect of metham sodium soil fumigation combined with microbial fertilizer on plant growth status of lanzhou lily (Lilium davidii var. unicolor)and soil bacterial and physic-chemical characters under the long term replanting in cold and arid climatic mountain areas in northwest China. The results showed that compared with CK, soil fumigation using metham sodium (SFM) significantly inhibited the lily growth and reduced the yield, while microorganism fertilizer (MF) treatment significantly promoted the lily growth and increased the yield. In MF treatment, compared with CK, some biochemical indicators significantly changed: soil fungal number decreased, while bacteria numbers, total soil porosity, water content, alkaline nitrogen, available potassium and available phosphorus increased, and soil pH decreased. Moreover, compared with CK, a combination of soil fumigation using metham sodium SFM and microorganism fertilizer (SFM+MF) treatment did not significantly affect the lily, but compared with SFM, plant growth indicators, soil bacterial and physic-chemical characters indicators improved. Thus, we concluded that in the vegetables cropping model where the vegetables are sowed in spring without irrigation in the this climatic areas, due to lower temperature and lower soil water content, metham sodium fumigation is likely to cause chemical damage to crops. Therefore, the combination soil fumigation using metham sodium and microorganism fertilizer could not alleviate the obstacles of vegetable continuous cropping. However, microbial fertilizer can effectively enhance the plant growth and alleviates the obstacles of continuous cropping, moreover, it can effectively reduce the negative effects of metham sodium fumigation; Meanwhile, Methyl isothiocyanate (MITC) and its precursors metham sodium and cotton vinegar, which might not decompose and volatile completely and be prone to make some chemical damage the crops, should be cautious in the usage of soil fumigation in this kind of vegetable cropping .model in this climatic areas.

Key words: continuous cropping obstacles, metham sodium, beneficial microorganisms

CLC Number: