摘要
为了解决灰棕漠土贮水、保肥能力弱,有机质含量低,制种玉米产量低而不稳的问题,选择甘肃省酒泉市肃州区的灰棕漠土,采用田间试验方法,研究了多功能土壤调控剂对灰棕漠土的改良效果。结果表明:多功能土壤调控剂最佳配比为:土壤调控剂0.928 8∶土壤保水剂0.001 2∶土壤营养剂0.068 1∶土壤结构改良剂0.001 9。经回归统计分析,多功能土壤调控剂经济效益最佳的施肥量为24.22 t/hm^2,制种玉米理论产量为6.76 t/hm^2。施用多功能土壤调控剂与传统化肥比较,灰棕漠土容重、pH值和汞、镉、铬、铅含量分别降低7.20%、5.51%和16.21%、28.85%、15.74%、18.02%,总孔隙度、>0.25 mm团聚体含量、总持水量、有机质含量、碱解氮含量、速效磷含量和速效钾含量分别增加6.44%、27.35%、6.43%、20.12%、0.80%、0.96%和0.16%,真菌、细菌、放线菌、蔗糖酶、脲酶、磷酸酶和多酚氧化酶分别增加117.31%、34.83%、22.06%、61.48%、45.92%、34.78%和60.32%;制种玉米产量和施肥利润分别增加7.15%和29.70%。施用多功能土壤调控剂,改善了甘肃河西走廊灰棕漠土理化性质,提高了制种玉米的经济效益。
In order to solve the puzzling questions of poor water storage and fertilizer retention ability,low organic matter content of gray brown desert soil,and low and unstable maize seed production grown on it,the paper studied the effects of improved gray brown desert soil of Gansu Corridor by using multifunctional soil conditioner and the method of field testing through selecting gray brown desert soil of Suzhou District of Jiuquan City. The outcomes show that the optimum recipe proportion of the multifunctional soil conditioner is soil conditioner 0.928 8 ∶ water retaining agent 0.001 2 ∶ soil nutrient 0.068 1 ∶ soil structure-improving agent 0.001 9. Through regression statistical analysis,the optimum fertilizer rate on economic benefits of multifunctional soil conditioner is 24.22 t/hm^2 and the theoretical yield of corn for seed is 6.76 t/hm^2.Comparing with applying multifunctional soil conditioner and traditional chemical fertilizer,the bulk density,pH value and the contents of Hg,Cd,Cr and Pb of gray brown desert soil are reduced by 7.20%,5.51%,16.21%,28.85%,15.74% and 18.02% respectively,total porosity,aggregate content >0.25 mm,total moisture capacity,organic matter content,alkali hydrolyzable nitrogen content,available phosphorus content and available potassium content increased by 6.44%,27.35%,6.43%,20.12%,0.80%,0.96% and 0.16% respectively,fungus,germs,actinomyces,invertase,urease,phosphatase and PPO increased by 117. 31%,34. 83%,22. 06%,61. 48%,45. 92%,34.78% and 60.32% respectively and the yield of corn for seed and fertilization profit increased by 7.15% and 29.70% respectively. Applying multifunctional soil conditioner has improved the physicochemical property of gray brown desert soil of Gansu Corridor and increased the economic benefits of corn.
出处
《中国水土保持》
2017年第6期46-50,共5页
Soil and Water Conservation in China
基金
国家星火计划项目(2015GA860001)
甘肃省重大科技专项计划项目(1602ZKDF021)
甘肃省工程技术中心建设计划项目(1306NTGF020)
关键词
多功能土壤调控剂
灰棕漠土
改良效果
河西走廊
multifunctional soil conditioner
gray brown desert soil
improvement effect
Gansu Corridor
