摘要
【目的】研究不同改良剂对覆膜滴灌盐碱土的改良效果。【方法】采用有机肥料、微生物菌剂、无机肥作为盐碱土壤改良剂,分析了不同改良剂对土壤pH值变化率、脱盐率、养分和玉米产量的影响。【结果】①不同改良剂均能降低盐碱土壤pH值和盐分,增加玉米产量,其中施用有机肥料300 kg/hm^2+微生物菌剂250 kg/hm^2的处理效果显著,在拔节期和成熟期,该处理的pH值变化率相比CK增加4.58%和2.65%,生育期内土壤脱盐率接近60%,玉米产量较CK增加39.04%;②施用不同改良剂后土壤有机质、速效钾在生育期内呈递增趋势,水解性氮、有效磷均呈先增加后减少趋势。【结论】在覆膜滴灌盐碱地的改良与利用中,以有机肥料和微生物菌剂为主要原料的微生物改良剂可作为优先选择。
【Objective】Study the improvement effect of different modifiers on saline-alkali soil under film mulching drip irrigation.【Method】Organic fertilizer,microbial agent and inorganic fertilizer were used as saline-alkali soil modifiers,effects of different modifiers on soil pH change rate,desalination rate,nutrients and corn yield were analyzed.【Result】①Different modifiers reduced the pH value and salt content of saline soil and increase corn yield,the treatment of 300 kg/hm2+microbial agent of 250 kg/hm2 had the most significant effect,the soil pH change rate of this treatment increased by 4.58%and 2.65%compared with CK in jointing and maturity,respectively the soil desalination rate was close to 60%during the growth period,and corn yield increases by 39.04%compared with CK.②After application of different modifiers,soil organic matter and available potassium showed an increasing trend,and the hydrolytic nitrogen and available phosphorus increased first and then decreased during the growth period.【Conclusion】In the improvement and utilization of saline-alkali land under the film mulching drip irrigation,microbial modifier with organic fertilizers and microbial agents as the main raw materials can be preferred.
作者
高金芳
董彦丽
王彦武
傅瑞斌
GAO Jinfang;DONG Yanli;WANG Yanwu;FU Ruibin(Gansu Science Institute of Soil andWater Conservation,Lanzhou 730020,China;Sichuan Heng Ecology Technology Company,Ltd,Deyang 618000,China)
出处
《灌溉排水学报》
CSCD
北大核心
2019年第8期59-63,共5页
Journal of Irrigation and Drainage
基金
甘肃省水利重点科研计划项目(2015-55-7)
甘肃省水资源费项目(甘水资源发[2019]77号)
关键词
景电灌区
滴灌
脱盐率
微生物改良剂
Jingdian irrigation district
drip irrigation
desalination rate
microbial modifier
