盐碱地稻田旱作后土壤肥力变化及其对作物生长的影响

研究了盐碱地稻田旱作后土壤肥力变化及其对作物生长的影响。结果表明,滨海滩涂盐碱地在水田改旱后土壤盐分呈现上升趋势,而土壤pH呈现下降趋势;不同培肥方法对水田改旱后土壤盐分、pH、土壤速效养分及有机质的影响作用不同,石膏处理能明显降低土壤pH值;绿肥处理能增加土壤速效养分和有机质含量;有机肥能抑制和延缓土壤盐分上升、降低土壤pH值、明显增加土壤速效养分和有机质含量,最终促进作物生长,增加作物产量。

Changes in Soil Fertilities and Crop Growth after Transferring Paddy Soil to Upland Soil

A field experiment was conducted to investigate the changes of soil fertilities and its effects on growth of crops after transferring paddy soil to upland soil.Results showed that total salt increased,while pH value decreased in the saline and aikaline land after transferring paddy soil to upland soil. The effects of different fertilizing manners on contents of total salt,soil pH,contents of soil available nutrients and organic matters were different.The gypsum treatment decreased soil pH significantly.The green manure treatment increased the contents of soil available nutrients and soil organic matter.The organic manure treatment inhibited and deterred the increase of total salt,decreased the soil pH value and increased the contents of soil available nutrients and soil organic matter,which accelerated the growth of crops and increased the yields of crops.