Effects of Simulated Acid Rain on Respiration Rate of Cropland System with Different Soil pH
模拟酸雨对不同pH值土壤农田系统暗呼吸的影响

To evaluate the effects of acid rain on the respiration rate of cropland system,an outdoor pot experiment was conducted with paddy soils of pH 5.48(S_1),pH 6.70(S_2) and pH 8.18(S_3) during the 2005-2007 wheat-growing seasons.The cropland system was exposed to acid rain by spraying the wheat foliage and irrigating the soil with simulated rainwater of T_1(pH 6.0),T_2(pH 6.0,ionic concentration was twice as rainwater T_1),and T_3(pH 4.4,ionic concentration was twice as rainwater T_1),respectively.The static o...