硼镁钙土壤调理剂对红壤旱地土壤酸化的阻控效果

Boron Magnesium Calcium Soil Conditioner: Effects on Acidified Soil Inhibition in Red Soil Dry Land

针对中国南方红壤旱地酸化问题,为硼镁钙土壤调理剂在该土壤上的应用和推广提供技术支撑。以红薯为主要作物,通过田间试验比较常规施肥(CK)与常规施肥配合施用硼镁钙土壤调理剂750 kg/hm^2(T50)、1500 kg/hm^2(T100)、2250 kg/hm^2(T150)在江西红壤旱地上对红薯产量的影响,以及土壤酸化的阻控效果。结果表明:与CK相比,连续2年施用硼镁钙土壤调理剂可以使红薯增产22.45%~78.40%,土壤pH提高0.13~0.30个单位,土壤交换性酸总量降低0.07~0.28 cmol/kg,且总体上均表现为随硼镁钙土壤调理剂用量的增加改善效果越好。对土壤碱解氮含量没有明确影响,对土壤有机质、有效磷和速效钾的含量提高效果不显著。总体来看,红壤旱地施用硼镁钙土壤调理剂可以明显提高红薯产量,在提高土壤pH和活化土壤磷、钾养分等方面也有一定作用。

Aiming at the problem of acidified red soil dry land in southern China, the paper aims to provide technical support for the application and promotion of boron magnesium calcium soil conditioner on the red soil. Taking sweet potato as the main crop, we compared the application of boron magnesium calcium soil conditioner with 750 kg/hm^2(T50), 1500 kg/hm^2(T100) and 2250 kg/hm^2(T150) and conventional fertilization(CK)by field test to study the effect on sweet potato yield in red soil dry land in Jiangxi and the acidified soil inhibition. The results showed that: compared with CK, the application of boron magnesium calcium soil conditioner for two consecutive years could increase the sweet potato yield by 22.45%-78.40%, the soil pH by0.13-0.30 units, and the total amount of soil exchangeable acid decreased by 0.07-0.28 cmol/kg, overall, the improvement effect was better with the increase of the amount of boron magnesium calcium soil conditioner.There was no clear influence on the alkali nitrogen content of soil, and the effect on soil organic matter,available phosphorus and available potassium was not significant. In general, the application of boron magnesium calcium soil conditioner in red soil dry land can significantly increase the sweet potato yield, and also play a role in increasing soil pH and activating soil phosphorus and potassium and so on.