The balance in nutrient availability and retention after addition of biochar depends on the feedstock and application rates of the biochar in different soils. A pot experiment was conducted to assess the potential effect of biochar derived from poultry litter (PLB) and acacia (ACB) feedstocks on selected rhizospheric macro and micro-nutrients, shoot and root biomass, as well as nutrient uptake by chickpea grown in three different soil types. Treatments consisted of two biochar (PLB and ACB), four application rates of 0 (control), 0.5, 1 and 2% w/w, and three soil types [Fernwood (Arenosol); Pinedene (Gleyic Acrisol); Griffin (Helvic Acrisol)]. PLB application at 2% increased rhizospheric pH, CEC, and P, K, Ca, Mg, S, Zn concentrations in Pinedene and Griffin soils. Chickpea shoot and root biomass in the Pinedene and Griffin soils were highest at 0.5 and 1% PLB application and was attributed to increase in soil N and N uptake. Application of PLB and ACB at 1 and 2% showed a significant change in rhizospheric pH and available P in Fernwood soil resulting in a reduction of Fe concentration. The higher C:N ratio of the ACB probably resulted in immobilization of nutrients as evident from the low response in shoot and root biomass as well as shoot N uptake of chickpea in all soil types. The study confirmed that the effect of biochar on the availability of soil nutrients and plant growth is associated with the nature of the biochar feedstock, the rate of application and the soil characteristics.

添加生物炭后养分的有效性和保留的平衡取决于生物炭在不同土壤中的原料和施用量。进行盆栽实验以评估家禽垃圾（PLB）和阿拉伯树胶（ACB）原料产生的生物炭对选定的根际宏量和微量营养素，枝条和根生物量以及三种不同生长的鹰嘴豆吸收养分的潜在影响土壤类型。处理包括两种生物炭（PLB和ACB），四种施用量，分别为0（对照），0.5、1和2％w / w，以及​​三种土壤类型[Fernwood（Arenosol）; 松油烯（Gleic Acrisol）; 格里芬（Helvic Acrisol）]。在松节烯和格里芬土壤中，PLB施用量增加2％时，根际pH值，CEC以及P，K，Ca，Mg，S，Zn浓度增加。Pinedene和Griffin土壤中的鹰嘴豆芽和根生物量最高，为0。施用5％和1％的PLB，归因于土壤N和N吸收的增加。分别以1％和2％的含量施用PLB和ACB表明，蕨木土壤的根际pH和有效磷显着变化，导致铁浓度降低。ACB较高的C：N比可能导致养分的固定化，从所有土壤类型中鹰嘴豆的芽和根生物量响应低以及鹰嘴豆的芽N吸收可见一斑。该研究证实，生物炭对土壤养分有效性和植物生长的影响与生物炭原料的性质，施用量和土壤特性有关。分别以1％和2％的含量施用PLB和ACB表明，蕨木土壤的根际pH和有效磷显着变化，导致铁浓度降低。ACB较高的C：N比可能导致养分的固定化，这从所有土壤类型中鹰嘴豆的芽和根生物量响应低以及鹰嘴豆的芽N吸收可见一斑。该研究证实，生物炭对土壤养分有效性和植物生长的影响与生物炭原料的性质，施用量和土壤特性有关。分别以1％和2％的含量施用PLB和ACB表明，蕨木土壤的根际pH和有效磷显着变化，导致铁浓度降低。ACB较高的C：N比可能导致养分的固定化，从所有土壤类型中鹰嘴豆的芽和根生物量响应低以及鹰嘴豆的芽N吸收可以明显看出。该研究证实，生物炭对土壤养分有效性和植物生长的影响与生物炭原料的性质，施用量和土壤特性有关。