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Dissolution of rock phosphate in animal manure soil amendment and lettuce growth

机译:磷酸石在动物粪便改良剂中的溶解和生菜生长

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A study was conducted in pots on the field to assess the effect of different quantities of poultry manure (PM), cattle manure (CM) and pig manure (PG) on the release of available phosphorus from Togo rock phosphate (RP) and lettuce growth. There were eleven (11) treatments which were: Control (soil only); 2.5g RP; 2.5g CM; 2.5gRP + 2.5g CM; 2.5gRP + 5gCM; 2.5gPM; 2.5gRP + 2.5gPM; 2.5gRP + 5gPM; 2.5gPG; 2.5gRP + 2.5gPG; 2.5gRP + 5gPG, applied per kg soil, using the Completely Randomized Design (CRD) with three replications. Available phosphorus and other parameters were assessed using standard methods. Results were statistically analyzed using the the GenStat (11th Edition) statistical software package. The amount and type of animal manure in the amendment affected the amount of the available P released. The addition of 2.5g manure to 2.5g RP in a kg of soil significantly (P<0.05) increased available P by 4 to 7 times over the sole 2.5g RP/kg soil treatment. Doubling the amount of manure in the amendment (5g manure + 2.5g RP) almost doubled the amount of P released, with the poultry manure combinations being more significant. The amount of available P in the soil positively related to the plant height (R2=63), leaf area (R2=0.55), dry weight (R2=0.73) and the percentage P in the leaf (R2=0.88) of lettuce. The PM at 2.5gRP + 5gPM recorded the highest significant (P<0.05) values. The study has provided further basis for manure selection and quantities to be used in enhancing the release of P from rock phosphate. However, investigations need to be continued using nuclear techniques.
机译:在田间盆中进行了一项研究,以评估不同量的家禽粪便(PM),牛粪便(CM)和猪粪便(PG)对多哥磷矿(RP)释放的有效磷和生菜生长的影响。有十一(11)种治疗方法是:对照(仅土壤); RP 2.5克2.5克; 2.5gRP + 2.5g CM; 2.5gRP + 5gCM; 2.5gPM; 2.5gRP + 2.5gPM; 2.5gRP + 5gPM; 2.5克2.5gRP + 2.5gPG;每千克土壤施用2.5gRP + 5gPG,使用完全随机设计(CRD),重复三遍。有效磷和其他参数使用标准方法进行评估。使用GenStat(第11版)统计软件包对结果进行统计分析。修正案中动物粪便的数量和类型影响释放的可用磷的数量。在2.5 kg RP的土壤中,每公斤土壤添加2.5 g粪肥(P <0.05)比单独的2.5 g RP / kg的土壤处理有效磷增加4至7倍。改良剂中的肥料量加倍(5g肥料+ 2.5g RP)几乎使释放的P量增加了一倍,而家禽粪便的组合更为重要。土壤中有效磷的含量与莴苣的株高(R2 = 63),叶面积(R2 = 0.55),干重(R2 = 0.73)和叶中的磷含量(R2 = 0.88)呈正相关。 2.5gRP + 5gPM的PM记录了最高的显着(P <0.05)值。该研究为粪肥的选择和增加磷矿中磷的释放量提供了基础。但是,需要继续使用核技术进行调查。

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