Uptake of moisture, iron and copper contents by field grown mature soybean seeds
2003
Achakzai, A.K.K. (Balochistan Univ., Quetta (Pakistan). Botany Dept.)
The study was conducted on two different sowing dates i.e., late sowing (LS) and early sowing (ES) in response to various level of added N fertilizer on the uptake of moisture, total iron (Fe) and copper (Cu) content of mature soybean cv. Williams-82 seeds. Seven different fertilizer treatments (T) were applied to both non-inoculated (non-inoc) and inoculated (inoc) field crops. Results showed that fertilizer treatments in general significantly (P less than 0.05) but adversely influenced the moisture, total Fe (except LS) and Cu content of both planting (BP) seeds, when compared with treatment receiving no fertilizer (T1). Results also suggested that by comparing the inoc with non-inoc in particular doses of fertilizer, inoculation in general significantly and positively influenced the moisture, Fe (except LS) and Cu contents (except ES). Statistically and numerically a maximum amount of moisture content is recorded in T4 inoc (49.93 g kg-1), Fe in T6 inoc (2.86 ppm) and Cu in T7 non-inoc (2.957 ppm). Results further enumerated that on the basis of grand mean values, ES produced 2.39, 11.86 and 33.41 % greater moisture, total Fe and Cu content over LS seeds, respectively. Results based on simple correlation coefficient (r) studies depicted that these three contents are non- significantly correlated with the yield of BP. However, total Fe and Cu did establish a significant negative association with oil content (- 0.529 and - 0.535) and soluble sugars (-0.537 and -0.715) of BP seeds, respectively. Therefore, it can be safely concluded that seed moisture, Fe and Cu contents could not be used a suitable selection criterion for predicting the grain yield, but total Fe and Cu could be used for reducing the oil and soluble sugars and increasing the starch contents in the mature seeds of soybean cv. Williams-82.
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