保护地大葱水肥一体化滴灌施肥应用研究

Integration of Water and Fertilization Through Drip Fertigation for Green Chinese Onion in Protected Field

以大葱为试材，通过对滴灌施肥和沟灌施肥2种不同的灌溉施肥方式比较，研究了水肥一体化滴灌施肥对大葱保护地栽培产量产值和水肥利用效率的影响。结果表明，滴灌施肥可以节水24．25％～26．65％，改善大葱农艺性状，增加大葱产量10．36％，提高大葱水分利用效率26．59％，增加经济效益12．90％；N、P、K素肥料利用率分别提高4．75％、4．53％和19．20％，土壤养分表观平衡较好。为今后水肥一体化滴灌施肥在大葱保护地栽培上的推广应用提供技术参考和科学依据。

Taking green Chinese onion as the test material, through the comparison of drip irrigation fertilization and furrow irrigation fertilization methods, the effect of integration of water and fertilization through drip irrigation on yield and water ＆ fertilizer use effi- ciency is studied in this paper. The results show that, drip fertigation can save water by 24. 25%~26.65%, improve the agronomic traits of onion, increase the yield by 10. 36%, enhance the water use efficiency by 26. 59% and increase economic benefits by 12. 90~. Also, the N, P, K fertilizer utilization rate is increased by 4. 75%, 4. 53% and 19.20%, respectively, and the soil nutri- ent balance is good. The study result can provide technical reference and scientific basis for the future application of drip fertigation in the cultivation of onion in protected field.