镁肥对小白菜产量、矿质元素吸收及土壤肥力的影响

发布时间：2018-06-28 23:01

本文选题：红壤 + 菜地　；参考：《土壤通报》2017年02期

【摘要】：中国南方红壤区菜地普遍存在缺镁现象,蔬菜生产上适量添施镁肥具有重要的现实意义。目前有关蔬菜施用镁肥的效应研究报道尚不多,尤其是我国南方红壤区菜地的相关研究则更少。采用田间小区试验方法,在农户常规施用化肥的基础上,对红壤菜地添施不同剂量的镁肥,研究施镁对蔬菜产量、营养元素吸收及菜地土壤基本肥力状况的影响规律。结果表明:在常规化肥施用的基础上,适量地添施镁肥(施硫酸镁112.5~450.0 kg hm~(-2)),小白菜增产幅度为12.4%~20.4%,氮、磷、钾及镁等营养元素的吸收量分别提高27.7%~42.5%、30.1%~84.9%、38.0%~80.3%和53.2%~131.9%,蔬菜收获后土壤全镁和交换性镁含量分别提高15.8%~68.4%和29.0%~119.0%。小白菜产量与施镁肥量可用一元二次方程y=-0.53x2+60.61x+9093(R2=0.961**)较好地线性拟合,由该方程可以得出,当施硫酸镁量为381.2 kg hm~(-2)时,小白菜可获得最高产量,即10825.8 kg hm~(-2)。
[Abstract]:There is a widespread lack of magnesium in vegetable plots in the red soil area of southern China. The application of magnesium fertilizer in vegetable production is of great practical significance. At present, there are few reports on the effect of magnesium fertilizer application in vegetables, especially in the southern red soil area of China. The effects of magnesium fertilizer on vegetable yield, nutrient absorption and soil basic fertility were studied on the red soil vegetable field. The results showed that on the basis of conventional fertilizer application, adding magnesium fertilizer (Magnesium Sulfate 112.5~450.0 kg Hm ~ (-2)) was 12.4%~20.4%, nitrogen, phosphorus and potassium. The absorption of nutrients such as magnesium and other nutrients increased by 27.7%~42.5%, 30.1%~84.9%, 38.0%~80.3% and 53.2%~131.9% respectively. The content of all magnesium and exchangeable magnesium in soil increased respectively after the harvest of vegetables, respectively, and the yield of 15.8%~68.4% and 29.0%~119.0%. small white cabbage could be fitted well by two times equation y=-0.53x2+ 60.61x+9093 (R2=0.961**). The equation can be concluded that when the amount of Magnesium Sulfate applied is 381.2 kg hm~ (-2), the highest yield of cabbage can be obtained, that is, 10825.8 kg hm~ (-2).
【作者单位】：福建省农业科学院土壤肥料研究所;
【基金】：国家科技支撑计划项目(2015BAD05B01-05,2012BAD14B15-6) 福建省属公益类基本科研专项(2014R1022-7)资助
【分类号】：S158;S634.3

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