Effect of blue-green algae with some organic materials and N.P. fertilizers on rice production
1988
Yahya, A.I. | Munam, B.H. | Al-Nassiri, A.S. (Scientific Research Council, Baghdad (Iraq). Agriculture and Water Resources Research Centre, P.O. Box 2416) | Abdul-Ridha, H.A. (Basrah Univ., Basrah Province (Iraq). Coll. of Agriculture)
A field experiment with rice was conducted under submerged condition, to study the effect of dried blue-green algae (BGA) on rice field in the presence of straw, cow and chicken manures. The fertilizers N.P. at a rate of 60 kg/ha were also included in the study for comparison. The application of BGA inoculum to soil increased nitrogen uptake by the plant and grain yield by 54% of control. Combining the dried inoculum with N.P. fertilizers enhanced nitrogen uptake and grain yield by 173% of control. However it decreased the available P in soil eight weeks after transplanting. Straw amendment to soil revealed no significant influence on rice yield. However, it increased the indigenous BGA numbers significantly. Combining the straw with BGA application induced a significant increase in nitrogen uptake and grain yield by 42% of control. Organic manures amendment to soil increased grain yield significantly and the grain uptake of N and P. The application of BGA to soil amended with organic manures decreased the grain yield and nitrogen uptake remarkably as compared with organic manure treatments only
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