Effect of fertilizer and inoculation on phosphorus, potassium and sodium content of pot culture mature soybean seeds
2003
Achakzai, A.K.K. | Kayani, S.A. (Balochistan Univ., Quetta (Pakistan). Dept. of Botany)
One year pot culture experiment on soybean cv. Williams-82 in Soil+FYM (3:1) was conducted in medium textured and salt free soil of Quetta, Balochistan. Seven fertilizer treatments were applied at the rate of zero (control); 23; 25; 50; 75; 100 and 125 kg N ha-1 plus a constant dose of 60 kg P2O5 and 30 kg K2O ha-1 respectively (except control). These fertilizer doses were applied to both non-inoculated (non-inoc) and inoculated (inoc) pot culture crop. Results suggested that added fertilizer significantly and inconsistently influenced the PO4 -P content, but negatively influenced the K content of mature soybean seeds. While reverse was true in case of Na contents. Results also revealed that by comparing the inoc with non-inoc treatments in particular doses of fertilizer, inoculation significantly increased the K and Na contents, but reverse was found for P contents. Statistically a maximum significant amount of P (6.86 g kg-1) was recorded in T3 non-inoc dose of fertilizer (viz., 25 + 60 + 30 kg NPK ha-1). While K (29.50 g kg-1) and Na+ (7.667 g kg-1) was noted in T2 inoc dose of fertilizer (viz., 23 + 60 + 30 kg NPK ha-1). The simple correlation coefficient (r) values revealed that P content was significantly and positively correlated with starch (0.764), but negatively with oil contents (-0.448). While K (-0.839) and Na contents (-0.638) showed significant negative association with soluble sugars. It was also noted that grain yield pot-1 established a significant negative association with K (- 0.573), but non-significant with P and Na contents of mature soybean cv. Williams-82 seeds.
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