Author(s): WANG Hong-juan, LIANG Cheng-hua, DU Li-yu
Pages: 51-54,58
Year: 2013 Issue:  12
Journal: Journal of Henan Agricultural Sciences
Keyword:  facility vegetable growing; soil aggregate; stability; inorganic grouting agent;
Abstract: The number and status of soil aggregates are the important indexes to measure and eva-luate the soil fertility .The solar greenhouses in which the vegetable was cultivated for 1 ,5 ,10 ,15 and 25 years ,respectively ,were chosen ,and the effect of cultivation in solar greenhouse on compo-sition and stability of soil aggregate was discussed .The results showed that with the increase of cultivation years ,the content of >0 .25 mm aggregate with mechanical stability in the soil and the mechanical stability of soil aggregate reduced year by year ,and greenhouse soil dropped more than outdoor soil ;the content of >0 .25 mm aggregate with water stability and the water stability of soil aggregate raised year by year ,and the grow th of greenhouse soil was higher than the outdoor soil .The organic matter helped to improve the water stability of soil aggregate ;the free iron ox-ide ,the free alumina ,amorphous alumina and >2 mm aggregate content was positively related ;the free iron oxide and > 2 mm aggregate content was significantly positive correlation ;amor-phous iron oxides ,complexing iron oxide and <0 .25 mm micro aggregate content was positively related .