毛乌素沙地南缘不同免耕农田土壤理化性质及玉米产量差异分析

Diversity analysis on physical-chemical properties and yield of corn in the South of Maowusu Sandlot different No-tillage farmland

毛乌素沙地南缘农田不同耕作措施土壤理化性质和玉米产量差异试验结果表明：与常规种植方式相比,在土壤理化性质方面,免耕处理的表层土壤持肥保水能力降低,土壤表层容重增加,而土壤有机质有所富积,玉米成熟期推迟5～10 d,易受霜冻危害;翻耕＋覆膜处理能明显提升玉米生长早期的地温,土壤持水能力好,养分稳定,玉米成熟期提前5d左右.在产量方面,翻耕＋覆膜处理比常规种植增产13.74%,而免耕种植仅减产1.66%,免耕种植的经济效益可观.

Different tillage methods in the South of Maowusu Sandlot farmland was tested, results show： tillage methods affect soil physical-chemical quality and corn yield, contracting tillage method, No-tillage surface soil＇s, sustaining water and fertilizer ability decreases, bulk density becomes larger and soil organism accumu- lates, the ripe is about for 5- 10 days later, and it＇ s more likely to suffer the frost hurt. In the tillage and cladding method, the soil temperature in early terms can be raised, obviously, the soil＇ s ability of sustaining water and nutrient becomes better. By cross- tillage and cladding method, yield can be increased by 13.74 % ; but by no-tillage conserve plant, yield will be decreased by 1.66 %, then, economic efficiency of no-tillage is to be considerable.