摘要
[目的]为曲靖市烤烟生产提供科学依据。[方法]对曲靖市植烟区土壤进行大规模的采样分析,结合土壤类型、海拔等因子对土壤Ca2+、Mg2+的现状进行分析。[结果]曲靖市植烟区土壤Ca2+含量较丰富,全市平均值为3 479.43 mg/kg;Mg2+含量丰富,全市平均值为336.4 mg/kg;Ca2+/Mg2+值60%以上大于10,局部区域高达17。土壤有效Ca2+含量大小顺序为:水稻土>红壤>紫色土>黄壤;土壤有效Mg2+含量大小顺序为:紫色土>水稻土>黄壤>红壤。Ca2+/Mg2+值:红壤>水稻土>黄壤>紫色土。Ca2+、Mg2+含量总体随海拔高度的增加呈下降趋势,海拔1 800~2 000 m内,土壤有效Mg2+最低,Ca2+/Mg2+值较高。[结论]曲靖市主要植烟区Ca2+/Mg2+值较高,所以在烤烟种植期需要在目前的基础上增加镁肥的施用量。
[ Objective] The scientific basis for the tobacco growth was provided. [ Method] The samples from the soils planted with tobacco in Qujing City were analyzed and the content of Ca^2＋ and Mg^2＋ were tested combined with the factors such as soil type and elevation. [ Results] The result showed that the amount of Ca^2＋ and Mg^2＋ in soil was very highly with the average value of 3 479.43 mg/kg and 336.49 mg/kg; the ratio of Ca^2＋/Mg^2＋ was over 10 in 60% samples and as high as 17 in some samples. The order of the effective Ca^2＋ in soil type was paddy soil 〉 red soil 〉 purple soil 〉 yellow soil; the effective Mg^2＋ , purple soil 〉 paddy soil 〉 yellow soil 〉 red soil and the ratio of Ca^2＋/Mg^2＋ , red soil 〉 paddy soil 〉 yellow soil 〉 purple soil. The amounts of Ca^2＋ and Mg^2＋ in soil were decreased with the increment of elevation; the content of the effective Mg^2＋ was lowest and the ratio of Ca^2＋/Mg^2＋ was highest in the area of the elevation between 1 800 m and 2 000 m. [ Conclusion] There was high ratio of Ca^2＋/Mg^2＋ in the soil planted with tobacco in the county and the application of more Mg^2＋ fertilizer should be considered.
出处
《安徽农业科学》
CAS
北大核心
2009年第2期697-698,共2页
Journal of Anhui Agricultural Sciences
基金
"西南地区耕地综合技术模式研究与示范"-"西南地力耗竭型种植系统耕地保育综合技术研究与示范"(2006BAD05B06-04)资助
