pH和质地对土壤供硼影响的研究

Effects of Soil pH and Texture on Soil B Supply

取广东省花生主产区5种代表性土壤,在连续栽种的情况下,研究土壤pH和质地对花生植株硼的积累及土壤有效硼变化的影响。结果表明,随着栽种次数的增加,土壤pH值呈显著上升趋势,而花生植株的硼积累量则呈显著下降趋势,二者表现出极显著负相关。土壤质地明显影响植株硼的积累量,不同粒级的土壤颗粒对花生各茬硼积累量的影响存在差异。土壤pH值和土壤有效硼的相关不显著,而质地与土壤有效硼表现正相关,并达到极显著水平。

Pot experiment was carried out to study the effects of soil pH and texture on B uptake by peanut and the variance of soil available B under the successive croping on 5 typical soils in main peanut cultivated areas of Guangdong province. Results show that soil pH increases significantly and the amount of B absorbed by plant decreases significantly, with the increase in times of croping. There is negatively significant correlation between soil pH and B accumulation in plant. Soil texture has apparent influence on B accumulation in plant. The effects of different particle size fractions of soils on B accumulation in plant are different. No significant relationship is shown between soil pH and soil available B, but soil texture has positively significant relation with soil available B.