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首页> 外文期刊>Australian Journal of Crop Science >Effect of lime, steel mill slag and phosphorus (P) in absorption of silicon and production of Tanzania grass (Panicum maximum)
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Effect of lime, steel mill slag and phosphorus (P) in absorption of silicon and production of Tanzania grass (Panicum maximum)

机译：石灰，钢厂炉渣和磷（P）对硅吸收和坦桑尼亚草产量的影响（最大草）

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Many pasture areas have Al toxicity, P deficiency and low pH as limiting factors; thus, slag from steel mill can improve Tanzania grass phosphate nutrition by the beneficial effects of the interaction of Si and P. The objectives of this work were to evaluate the “availability” of P and Si in the soil, growth, P and Si accumulation and dry matter production in Tanzania grass plants. The experiment was carried out in a green house in a low-P soil amended with slag and lime and fertilized with P during three cutting seasons at Jaboticabal - S?o Paulo, Brazil. The experimental design was a randomized block arranged in a 2×5 factorial with three replicates. Treatments consisted of lime and steel mill slag applications. The other sources of variation were five rates of P [0, 100, 200, 300 and 600 mg dm-3 pot-1 as triple superphosphate (45% of P2O5 soluble in citric acid at 2%)]. The experimental units were 3 dm3 pots. There were increases in the variables plant growth and forage production with increases in available P, suggesting the use of slag as a soil amendment. Slag as soil corrective improved soil chemical attributes by pH correction and by increases in the base saturation index, reflecting in yield gains and in P and Si accumulation in the forage Panicum maximum. However, it did not increase the available Si in the soil, due to the low rates supplied, and did not differ from the traditional source regarding the availability of P in the soil.
机译：许多牧场以铝毒，磷缺乏和低pH为限制因素。因此，钢厂的炉渣可以通过Si和P相互作用的有益效果改善坦桑尼亚草酸盐的营养。这项工作的目的是评估土壤中P和Si的“有效性”，生长，P和Si的积累和坦桑尼亚草类植物的干物质生产。该实验是在Jaboticabal-巴西圣保罗的三个切割季节的低磷土壤中的温室中进行的，该土壤中掺有矿渣和石灰，并用P施肥。实验设计是按2×5析因排列的随机区组，具有三个重复项。处理包括石灰和钢厂炉渣的应用。其他变异来源是P的五种比率[0、100、200、300和600 mg dm-3 pot-1，为三重过磷酸盐（45％的P2O5溶于柠檬酸，为2％）]。实验单位是3 dm3盆。随着可利用磷的增加，植物生长和草料产量的变量也增加了，这表明将矿渣用作土壤改良剂。用作土壤校正剂的矿渣通过pH值校正和碱饱和指数的提高来改善土壤化学特性，这反映在产量的提高以及草料Panicum最大值中P和Si的积累上。但是，由于供给速率低，它没有增加土壤中的有效硅，并且在土壤中磷的有效性方面与传统来源没有区别。

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