The effect of spray humic acid on leaves to growth, development, yield and quality of rice of C70 variety
2004
Mai Thi tan | Nguyen Truong Son | Mai Nhu Thang | Nguyen Khac Dan | Vu Thi Chanh Nguyen Thanh Chung
It can be concluded based on the findings from it research that spray humic acid on leaves were effected to increase height, ability of tillerage, ratio of effective branch, index of leaf area, volume of dry matter and number of rice flower/unit of land, number of good seeds/rice flowers, ratio of good seed and weigh of 1.000 seeds.Therefore, it had effected to increase potential and net yield in comparison with un-control experiment. The result of research is also shown that the spray humic acid on leaves of rice of C70 variety had effected to increase productivity and quality of rice in the period of post- harvest. All formulas with including humic acid had higher ratio of return rice in comparison with un-control experiment. The optimal formula is the solution of humic acid 0.03 percent and it should be sprayed earlier at the time of tillerage or it is better at the time of tillerage and rice booting stage. Thus, it can be increase yield of rice from 13.2 - 17.0 percent in comparison with un-control experiment (without muck fertilizer application), and 6.6 - 10.1 percent (with muck fertilizer application).
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