Effects of Nitrogen Forms on Root Morphology and Phosphorous Efficiency in Soybean (Glycine max L.)
Nitrogen plays an important role in root morphology and efficiency of phosphorous in soybean. In this paper, a pot culture experiment was carried out to study the effects of different forms N( including N2, NO3- -N, NH4+ -N, Glycin-N, Pro-tein-N and Urea-N) on the variation of dry weight (DW) , root to shoot ratio (R/S) , root morphology and efficiency of P in soybean ( Glycine max L.). The results showed that the impacts of nitrogen forms on soybean root growth, root morphology, efficiency of P absorption and utilization were different, for example, efficiency of P absorption in NO3- -N and Protein-N treatment was higher than that in other N treatments with soybean growth stages, while no significant difference was found between NO3- -N and Protein-N treatment, moreover, efficiency of P absorption in Glycin-N, Urea-N and NH4+-N treatment was higher than that in CK( biological nitrogen fixation), however, no significant difference was found among these three treatments, the similar trend appeared in root DW, root length, root surface area, root volume, and so on. But the reverse condition was showed in R/S, root average diameter and efficiency of P utilization.
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NSTL
万方数据
维普
