Back X. H. Shao1, D. Y. Liu1, P. Jiang2 and W. L. Cao2
Water Conservancy & Hydro-power Engineering, Hohai University, Nanjing 210098, P.R.China1 and
Division of Agriculture Water Conservancy, Zhejiang Provincial Bureau of
Water Resources, Hangzhou, 310009, P.R.China2
Full Paper (PDF File: 24KB)
Abstract
There have existed wide areas of soil secondary salinization in the western
districts and coastal zones in China due to non-reasonable irrigation without
good drainage systems. Secondary salinization of soils causes lower productivity
of crops because of high salinity and poor structure .In order to ameliorate
these saline-alkaline soils, EM technology combined with subsurface drainage
is applied in the rice production in Ningxia and Zhejiang provinces. The
results are summarized as follows (1) EM Bokashi with subsurface drainage
treatment is the most effective in controlling the secondary salinization
and raising rice grain yield and quality compared with other treatments;
(2) EM technology can also increase soil organic substance content, improve
soil porosity and permeability and raise soil available nutrients; (3)EM
technology can evidently reduce amount of chemical fertilizers application,
thereby improving the agriculture environment.