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通过盐碱集中区土壤盐分检测及监测,制定可行的水盐调控方案,采用黄腐酸作为化学改良剂改良膜下滴灌盐碱地,并对比分析棉花长势和产量。结果表明,随着灌水时间及灌水量的增加,土壤盐分呈现出先明显降低后局部上升的趋势;改良后,土壤pH值、易溶盐总量、SO24-、HCO3-、Mg2+、Cl-、Ca2+、K++Na+均呈明显降低趋势;试验区内棉花好、中、差3种长势类型条件下株高、棉桃数、茎粗、叶面积、产量等均优于试验区外。
Based on the detection and monitoring of soil salinity in saline-alkali concentration area, a feasible water and salt regulation scheme was formulated. Fulvic acid was used as chemical modifier to improve the drip irrigation of saline-alkali soil and the cotton growth and yield were compared. The results showed that with the increase of irrigation time and irrigation volume, the soil salinity showed a trend of first decreasing and then rising locally. After the improvement, the soil pH, total soluble salts, SO24-, HCO3-, Mg2 +, Cl- and Ca2 + , K + + Na + all showed a significant decreasing trend. The plant height, boll number, stem diameter, leaf area and yield were all better than those in the experimental area under the condition of good, medium and poor cotton.