黄淮海平原高水肥改良中低产田耕地质量动态评估

为研究黄淮海平原地区改良中低产田进程中广泛采取的高水肥措施对耕地综合质量发展的影响,在河南封丘布置田间小区试验,通过测产、采样和分析,研究不同施肥方案和不同肥料处理下的耕地土壤及作物的质量动态,评估各处理的利弊权重.结果表明:优化施肥和高水肥措施有利于提高作物根系吸水能力、增加作物对土壤氮素的利用、提高耕地作物产量和品质、抑制土壤碱性增加.但是当前施肥制度尤其在高肥处理下耕地土壤有板结现象;优化施肥方案中的高肥处理不利于底层土壤脱盐,易引发土壤次生盐渍化;高水肥措施下土壤保肥能力较差.针对不同施肥处理的利弊权重提出以优化施肥技术和高水肥措施为技术主导进行中低产田改良,增加耕地作物产量和改善品质,同时需配合土壤次生盐渍化防控措施、土壤培肥措施和农艺措施,除弊扬利,实现耕地综合质量的全面、持续提升.

Assessment of farmland quality in the improvement process of mid-low yield lands under high water-fertilizer treatments in Huang-Hua-i Hai Plain

In order to study the impacts of high water-fertilizer treatments widely used in the improvement process of mid-low yield lands in Huang-Huai-Hai Plain on the comprehensive farmland quality,field experiment was conducted in Fengqiu,Henan Province.By calculating field yield,sampling and testing soil and plant,the comprehensive quality dynamics of soil and crops under different treatments were analyzed,and the weights of advantages and disadvantages of each treatment were assessed.The results show that the tr...