Investigate the effect of humic acid and phosphorus on yield and treatments of corn
2014
Samavat , Saeed | Tabakhian,Sheida | Delavari, Amir | Samavat , Simin
To study the effects of humic acid on phosphorus uptake in corn, a field experiment in a factorial randomized complete block design with three replications was conducted in Karaj soil and water research station . The treatments consisted of : 1) humic acid at four levels : zero , 20 , 40 and 60 liters per hectare. 2 ) P ( triple super phosphate ) at three levels : zero , 25 % lower than soil test and based on soil test. In vitro the effects of humic acid on phosphorus sorption in soil were studied at 2, 7, 14, 21, 28, 32 and 60 days after beginning of expriment. The results showed that the effect of treatments on the amount of phosphorus in corn yield were significant . The highest yield of maize were in the treatment of humic acid at 40 liters per hectare and in based on soil test treatment . With the increasing the times and phosphorus consumption the amount of available phosphorus was reduced. Key: Humic Acid- Avaible phosphorus- Zinc- Corn
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