改良剂对甘肃引黄灌区新垦盐碱荒地的改良效果研究

Study on Improvement Effects of Improvers on Recentaly Reclaimed Saline-alkali Wasteland in Gansu Yellow River Irrigation Areas

使用土壤改良剂在甘肃引黄高扬程灌区对新垦盐碱荒地的改良效果表明,8种盐碱地改良剂对油葵都有增产效果,增幅1.26%～26.36%。丹路菌肥增产效果最好,达3 594.7 kg/hm2,较不施改良剂增产749.8 kg/hm2。丹路菌肥、丹路菌剂和腐殖酸改良剂对土壤全盐含量的影响较小,施用其余改良剂均增加了土壤盐分;磷石膏降低土壤pH值的作用最明显。磷石膏和糠醛渣增加了土壤中的SO42-和Ca2+含量。总的来看,施用糠醛渣和磷石膏的投入成本最低,纯收益和产投比却最高。

The effect of soil conditioner on soil characteristics of recently reclaimed saline-alkali wasteland in Irrigation System with High Pumping Head in Gansu was studied. The results showed that the 8 kinds of soil conditioner can improve the yield of oil sunflower （1.26%-26.36%）. Danroad bacterial fertilizer＇s yield-increasing was the best, it can increase tke yield to 3 594.7 kg/hm^2, the produced were 749.8 kg/hm^2 more than that Control. Danroad, fertilizer, Dan Road, agents and humic acid amendments on soil salt content is small, the application of the rest of the improvers are increased soil salinity; phosphogypsum reduce soil pH is the most obvious. Phosphogypsum and furfural residue increased soil SO4^2- and Ca2＋ content. Overall, the application of furfural residue and phosphogypsum lowest input costs, net income, and output to input ratio has the highest.