5. under the cultivation model of the fungus dreg:straw:sand=3:0:l(vol proportion), optimal quantity of commercial organic fertilizer Fu erdi and Tian Bishi in pot is llg/pot, and using Tian Bishi quantities of fertilizer recommended in the field is 3126kg/hm2,using Fu erdi quantities of fertilizer recommended in the field is 3230kg/ hm2.
To understand the effect of application of commercial organic fertilizer combining balanced fertilization of NPK chemical fertilizer on lettuce,the field experiment in this paper was conducted in 2004.The experiment was designed according to the rules of lettuce needing fertilizer,the yield level of local lettuce,and the habit of peasant fertilizing.
In a pot experiment, sweet pepper was grown on an organic substrate composed of sand and mushroom dregs at the ratio of 3∶1 and was supplied with the commercial organic fertilizers "Tianbishi" and "Fuerdi" to investigate their growth-accelerating yield-improving effects.
The raw materials which comprise commercial organic fertilizers are rather complicated and may contain certain quantity of toxic substances such as heavy metals, which could produce unpredictable adverse impact on soil and eco-environment.
Here some ideas are put forward to further promote the development of agricultural cyclic economy via practice of extending commodity organic fertilizer.
Organi fertilizer produced by NMF can satisfied GB7959-87 and relieve inhibition of germentation of rape. The content of heavy metal accord with quality criterion of commodity organic fertilizer.
There was great variability in the contents of heavy metals such as Zn, Cu, Cr, Pb, Cd, Ni, Hg and As in the commercial fertilizers. On average, the contents of the above heavy metals were 732.4, 75.4, 53.5, 36.6, 5.64, 21.0, 0.44 and 2.96 mg·kg-1, respectively.
In order to safely use the compost that produced by animal wastes,the content of heavy metals,such as Cu,Zn,Pb,Cd,Cr,As and Hg were measured separately in five commercial composts that produced by bovine,fowl and porcine dejection.
The results showed that:organic manure was benefit for the quality development of watermelon fruit,and was attributed to the accumulation of soluble sugar,soluble protein,Vc and soluble solids.
SOLVING THE PROBLEM OF POLLUTION OF DOMESTIC ANIMALMANURE IN SHANGHAI BY INCUBATING MARKET OF COMMERCIAL ORGANIC FERTILIZERS AND DEVELOPING ORGANIC FERTILIZER INDUSTRY