不同覆膜方式对玉米表层土壤含水量、产量和水分利用效率的影响

试验在行上覆膜、行间覆膜及不覆膜3种不同处理下,对玉米土壤水分动态变化、产量和水分利用效率进行了系统研究.结果表明,从播种到6月中旬,不同覆膜处理表层土壤含水量表现为:SPF-N＞UPF-W＞UPF-N＞SPF-W＞ck;6月中旬到7月下旬不同覆膜处理表层土壤含水量则表现为:UPFW＞ck＞SPFW＞UPFN＞SPFN;8月上旬到玉米收获,不同覆膜处理下表层土壤含水量差异较小.同时,玉米产量以行间覆膜处理产量最高,平均产量为10568.8 kg/hm2,较对照增加2000.5 kg/hm2,增产18.9%;UPF处理次之,较对照增加1004.5 kg/hm2,增产10.5%.试验结果进一步表明,以行间覆膜处理水分利用效率为最高.

Effect of Different Film Mulching on Water Content in Surface Soil,Yield and Water Usage in Corn

the experiment studied Changing of soil moisture content in maize farmland,Yield of maize and water use efficiency under three different treats: covering film on furrows,covering film between furrows and no film mulching.It indicates that from sowing to the middle ten days of 6 month different treat's top layer soil moisture content shows: SPF-N>UPF-W>UPF-N>SPF-W>ck;from the middle ten days of 6 month to the last ten-day period of 7 month different treat's top layer soil moisture content shows UPFW>ck>SPFW>UPFN>SPFN;from the middle ten days of 8 month to harvest different treat's top layer soil moisture content have small difference.At the same time,covering film between furrows has the highest yield,the average yield is 10568.8kg/hm2.It increases 2000.5kg/hm2 than ck.It increases production 18.9%.Covering film on furrows increases 1004.5kg/hm2 than ck.It increases production 10.5%.The experiment also indicates covering film between furrows has the highest water use efficiency.