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本文论述了红壤旱地双季玉米种植制中就地解决旱季覆盖材料的可能性及覆盖的抗旱保墒效应。研究表明,以竹豆和早玉米稿秆分别作为伏、秋旱期间的覆盖材料是可行的。在两季覆盖下,玉米年增产率平均为6.9％。覆盖的保水效应:玉米封行前表现明显,每次降水(或灌溉)后,均可提高土壤抗旱能力5～7天。在此期间内能增加土壤含水量0.4％～0.8％;玉米封行后,覆盖有利于保蓄阵性降水,但对防止土壤水分蒸发损耗作用甚微。
This paper discusses the possibility of on-the-spot solution of dry season cover material in maize cropping system of double-season red soil and the effect of drought-resistant and soil conservation covering. Studies have shown that it is feasible to use bamboo beans and early maize straw as covering materials during autumn and autumn drought respectively. Under the coverage of two seasons, the annual yield of corn will average 6.9%. Coverage of the water retention effect: corn seal line before the obvious performance, each precipitation (or irrigation), can improve soil drought tolerance of 5 to 7 days. During this period can increase the soil moisture content of 0.4% ~ 0.8%; maize seal, the cover is conducive to preserve precipitation, but to prevent the loss of soil moisture evaporation little effect.