Leaf SPAD values measured in Exp. 1 and Exp. 2 are shown in.Table 3. The main effect of CA and the interaction effects of S CA.And S CA N were significant in, Exp 1 while only the effect of.S CA was significant in Exp. 2 (data not shown). In contrast to the.Positive effect on SHX, and XSF CA resulted in decreased leaf SPAD.Values. The decrease was most prominent at HK1 where leaf, SPAD.Values for treatments without N fertilizer application were lowest.At the 16 t HA1 CA-level for Apo and at the 8 T HA1 CA-level for.Vieng. Similar trends in leaf SPAD values were observed, at LO1 but.The differences were not statistically significant. These results.Indicated that CA decreased plant N uptake which confirms, the.Results of Lehmann et al. (2002), who also described a decrease in.Plant N uptake and attributed the effect to N immobilization.Caused by the high C / N ratio of the applied biochar.The N fertilizer treatment in Exp. 1 alleviated the CA-induced.Decrease in leaf SPAD values. However leaf SPAD, values in Nfertilized.Plots also decreased as the CA, amount increasedIndicating that excessive CA may offset the effect of N fertilizer.3.2.
การแปล กรุณารอสักครู่..
