黄淮海平原封丘县土壤肥力变异与农田生产力相关研究

Soil Fertilities and Its Relationship to Maize Productivity in the North China Plain

通过对黄淮海平原封丘地区土壤肥力现状及其与农田生产力相关性研究,结果表明,区域潮土的肥力质量得到普遍提高,土壤有机质、全N、速效P等养分含量得到显著增加,而土壤速效K含量显著降低。土壤肥力、农田管理措施与玉米产量的灰色关联分析表明,土壤肥力对玉米产量的影响大于农田管理措施,土壤肥力因素中,全N、速效P和碱解N的影响较大;农田管理措施中,以灌溉次数对玉米单产的影响较大。这为区域农田土壤质量研究、管理和政策决策提供了科学依据。

The current soil fertility status and the relationship between the soil fertilities and farmland productivity at Fengqiu in the North China Plain were studied in this paper. The results showed that soil fertilities were significantly improved since 1980s. Soil organic matter, totaI-N and available-P contents were increased obviously, but soil available-K was reduced remarkably. The influence of soil fertilities on corn yield was larger than that of farmland management measures. And among the factors of soil fertilities, the influence of Total-N, available-P and available-N on yield were larger. The research results could provide a scientific basis for decision-making in crop production.