摘要
为探索适宜砒砂岩与沙复配土土体有机重构的植物营养保障措施,开展以生物炭为改良剂的不同梯度盆栽试验,得到适合复配土肥力提升的生物炭施用比例,为复配土的植物营养保障提供技术支撑。研究表明:生物炭能够有效提高土壤持水保肥能力,有利于提高土壤营养元素利用效率。其中投加30g·kg^(-1)生物炭,复配土中各养分含量最高,且作物长势较好;生物炭对复配土中速效钾、有效磷、铵态氮的提升可持续性较好,对复配土中硝态氮提升可持续性较差;在适当比例的生物炭作用影响下,会较好的提升复配土的肥力,若过量施用会抑制作物生长。
In order to explore the suitable plant nutrient safeguard measures for the organic reorganization of soils,the different gradient pot experiments with biochar as modifier were carried out to obtain the suitable proportion of biochar application for soil fertility enhancement.To provide technical support.The results showed that biochar could improve soil water holding capacity and improve soil nutrient use efficiency.Among them,the highest nutrient content in the compound soil is the treatment of 30g·kg^(-1),and the crop growth is better;the biochar is better for the available potassium,available phosphorus and ammonium nitrogen in the compound soil.The nitrate nitrogen in the mixed soil is less sustainable.Under the influence of the corresponding proportion of biochar,the fertility of the soil will be improved,and the excessive application will inhibit the crop growth.
基金
国土资源部公益性行业科研专项(201411008)
关键词
生物炭
土体有机重构
复配土
biochar
soil organic reconstruction
compound soil
