摘要
针对目前生产上存在盲目施肥的现状,通过田间试验设置不施肥,农户常规施肥施用磷酸二铵300 kg·hm^(-2)、硫酸钾100 kg·hm^(-2),53%玉米配方肥350 kg·hm^(-2)、尿素225 kg·hm^(-2)3个施肥种类,研究不同施肥种类的玉米在不同生育时期超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量及其产量的变化。结果表明,不同施肥种类玉米叶片SOD酶活性在整个生育期先上升,且在大喇叭口期(Ⅱ)达到最大值,然后再持续下降,且配方施肥处理SOD酶活性明显高于其他两种施肥处理;MDA含量在整个生育期呈持续上升趋势,以配方施肥处理MDA含量最低。3个处理中配方施肥处理产量最高,8 538 kg·hm^(-2),其次是常规施肥处理,7 698 kg·hm^(-2),以CK对照处理产量最低,7 129 kg·hm^(-2),配方施肥处理比对照处理增产19.8%,常规施肥处理比对照处理增产8%。各施肥处理间均达到极显著水平,玉米配方施肥具有较好的增产增收作用。
To address the current challenge of blind fertilization in maize production, we designed a field experiment with three treat ments： no fertilizer application, conventional fertilization adopted by farmers with 300 kg·hm^-2 of diammonium phosphate, 100 kg·hm^-2 of potassium sulphate as well as 53% maize formula fertilization with 350 kg·hm^-2 of formula fertilization and 225 kg·hm^-2of urea. The SOD enzymatic activity and MDA content at each growth stage and yield were investigated. The results showed that, with different fertilization practices, SOD enzymatic activity in maize leaves increased firstly, reached a peak at the bell stage, and then decreased gradually. In addition, the SOD enzymatic activity in the treatment with formula fertilization was apparently higher than any other two treatments. MDA content continually went up across the whole period of growth, but the lowest value was found in the treatment of formula fertilization. The yield of formula fertilization treatment was the highest resulting in 8 538 kg·hm^-2, followed by the treatment of conventional fertilization with the yield of 7 698 kg·hm^-2, and the control treatment 7 129 kg·hm^-2. The yield of the formula fertilization treatment was 19. 8% higher than control, while the conventional fertilization treatment was 8% higher than control. The formula fertilization would be practicable to the increase of maize yield.
出处
《土壤与作物》
2016年第3期166-170,共5页
Soils and Crops
基金
国家测土配方施肥补贴项目(570)
