Effects of Mulching Materials on Maize Yields,Economic Benefits and Soil Moisture Distribution under Drip Irrigation
In order to explore the effects of mulching materials on maize growth,yield,economic benefits and soil moisture distribution under the integrated condition of drip irrigation,fully biodegradable film,thickened plastic film,and straw wereusedas the research objects and traditional bare land planting and ordinary PE film were used as a control to study the effects of different mulching materials onmaize yieldand soil moisture distribution.The results showed that yield and wateruse efficiency(WUE)of maize covered with straw,thickened PE film,and biodegradable film were 13 114.5 to 13 708.5 kg/ha and 24.17 to 25.11 kg/(mm·ha),respectively which were 1.4 to 6.0%and 2.3%to 3.8%higher than that of PE film,respectively.The output value andeconomic benefits of straw,thickened PE film,and biodegradable film covering were higher than those of PE film and bare land and peaked understraw cover(38 382.0 and 24 282.0 Yuan/ha,respectively),and followed by biodegradable film(37 674.0 and 21624.0 Yuan/ha,respectively)and thickened PE film(36 718.5 and 21 568.5 Yuan/ha,respectively).The soil moisture in the ground mulching treatment showed a typical'bimodal'curve,and the deep soil moisture was lower than that bare land after harvesting.In irrigation areas along the Yellow River with low rainfall and high evaporation,the main function of mulching is to reduce evaporation and retain soil moisture.It is completely feasible to replace ordinary PE film with biodegradable and environmentally friendly degradable film,easily recyclable thickened PE film,or straw for carbon fixation and fertilization.
Drip irrigationMulching materialMaizeYield and Economic benefitWater use efficiencySoil moisture dis-tribution
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