特贝钙土壤调理剂在南方红壤区蔬菜上的应用效果

Application Effect of Tebeigai Soil Conditioner on Vegetable in Red Soil Areas of Southern China

通过田间小区试验,研究了施用不同用量(750、1 500、2 250和3 000 kg·hm-2)的特贝钙土壤调理剂处理对连续种植2茬蔬菜的产量、菜体重金属Cd和Pb含量、蔬菜收获后土壤的酸度及有效态重金属Cd和Pb含量的影响。结果表明:与不施特贝钙土壤调理剂处理相比,施用不同用量的特贝钙土壤调理剂(750~3 000 kg·hm-2)处理可增加蔬菜产量9.2%~43.8%;降低蔬菜重金属Cd含量13.3%~68.0%、Pb含量12.4%~71.1%,并提高蔬菜收获后土壤pH值2.7%~17.6%,降低土壤的交换性氢7.4%~42.2%、交换性铝20.5%~55.4%,同时减少土壤中有效态Cd含量15.6%~66.1%、有效态Pb含量3.6%~34.7%。其中,特贝钙土壤调理剂施用量为2 250~3 000 kg·hm-2处理在蔬菜生产上的应用效果总体上表现更佳。因此,施用特贝钙土壤调理剂是实现南方红壤蔬菜增产、活化土壤养分和阻控土壤酸化的重要途径。

In a plot experiment effects of different amounts of Tebeigai soil conditioner(750,1 500,2 250 and 3 000 kg·hm-2)on yield of vegetables from two consecutive cropping seasons,Cd and Pb content in the vegetable,soil acidity after harvest,and available Cd and Pb content were studied.The results showed that with no soil conditioner as control,Tebeigai soil conditioner could improve yield of vegetable by 9.2%-43.8%.Moreover,Tebeigai soil conditioner could decrease Cd content in the vegetable by 13.3%-68.0%and Pb content in the vegetable by 12.4%-71.1%,soil pH value after harvest by 2.7%-17.6%,exchangeable H+content by 7.4%-42.2%m exchangeable Al3+content by 20.5%-55.4%,available Cd content by 15.6%-66.1%and available Pb content by 3.6%-34.7%.The amount of Tebeigai soil conditioner was 2 250-3 000 kg·hm-2 could show good effects.So application of Tebeigai soil conditioner was a key method to improve vegetable yield,activation of soil nutrients and prevent soil acidification.