不同改良剂对棕红壤酸性的改良效果

Influences of Various Modifiers on Acidity of Brown Red Soil

对安徽省宣城地区酸性土壤改良剂的种类筛选和施用量进行研究，结果表明：选择熟石灰粉、碳酸钙粉、白云石粉都能较好地改良土壤酸性，使作物大幅增产；适宜的改良剂施用量为：熟石灰粉1125-1687．5kg/hm^2、碳酸钙粉1500—2250kg／hm^2，白云石粉1500—3000kg/hm^2。

The influences of different modifiers on the acidity of brown red soil in Xuancheng City of Anhui Province were studied. The results showed that white lime power, calcium carbonate power and dolomite power all worked well on improving brown red acidity and increasing cole yield, and the feasible applied amounts of modifiers should be 1125 - 1687.5 kg/hm^2 of white lime power, 1500 - 2250 kg/hm^2 of calcium carbonate power and 1500 - 3000 kg/hm^2 of dolomite powder.