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| DOI：10.13522/j.cnki.ggps.20190131 |
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| Improvement Effect of Film Mulching Drip Irrigation on Saline-alkali Soil |
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GAO Jinfang, DONG Yanli, WANG Yanwu, FU Ruibin
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1.Gansu Science Institute of Soil and Water Conservation, Lanzhou 730020, China; 2. Sichuan Heng Ecology Technology Company, Ltd, Deyang 618000, China
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| Abstract: |
| 【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. |
| Key words: Jingdian irrigation district； film mulching drip irrigation； desalination rate； microbial modifier |
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