CAJ | 학술논문

为了探明寒区玉米大垄双行直播种植方法适合的种植密度和增产机制，试验以小垄为对照，通过测定土壤温度、土壤水分、玉米群体内光照强度及玉米产量性状等指标，研究了3个密度下玉米大垄双行直播种植效果。结果表明：大垄双行处理对土壤温度没有显著影响，但增加了0～20 cm土层的土壤水分含量；大垄双行减少了垄沟顶层叶片的光照截获，高密度处理（6．00万株· hm-2）底层（出地表1/3）仍然保持一定的光照强度（72．5μmol·m-2·s-1），减少了空秆率，在乳熟期单位面积干物质重显著增加；2008年大垄双行高密度处理（S3）产量为9193．5 kg·hm-2，较对照（CK3）增产911．3 kg·hm-2。大垄双行直播种植方法增产机制主要是通过增加土壤湿度和调控群体内部光照强度影响产量。
위료탐명한구옥미대롱쌍행직파충식방법괄합적충식밀도화증산궤제，시험이소롱위대조，통과측정토양온도、토양수분、옥미군체내광조강도급옥미산량성상등지표，연구료3개밀도하옥미대롱쌍행직파충식효과。결과표명：대롱쌍행처리대토양온도몰유현저영향，단증가료0～20 cm토층적토양수분함량；대롱쌍행감소료롱구정층협편적광조절획，고밀도처리（6．00만주· hm-2）저층（출지표1/3）잉연보지일정적광조강도（72．5μmol·m-2·s-1），감소료공간솔，재유숙기단위면적간물질중현저증가；2008년대롱쌍행고밀도처리（S3）산량위9193．5 kg·hm-2，교대조（CK3）증산911．3 kg·hm-2。대롱쌍행직파충식방법증산궤제주요시통과증가토양습도화조공군체내부광조강도영향산량。
To explore the mechanism of yield improvement and proper density of maize under wide ridge and double row cropping ,an experiment was conducted with three planting densities by using narrow ridge cropping as the control , and soil temperature ,soil moisture ,illumination intensity and yield traits were measured .The results showed that wide ridge and double row cropping had little effect on soil temperature ,but increased soil moisture in 0~20 cm layer .Under the condition of wide ridge and double row cropping ,the light capture of top leaves in furrow decreased ,and the bottom layer of plants (1/3 above ground) remained certain illumination intensity (72 .5 μmol·m-2·s-1 ) in the treatment of high planting density (60 000 plants · hm-2 ) , which contributed to decrease rate of barren stalk and to increase dry weight obviously at milky maturity stage .The yield of wide ridge and double row cropping with high planting density (S3) was 9 193 .5 kg·hm-2 in 2008 ,being 911 .3 kg·hm-2 higher than the control (CK3) .Wide ridge and double row cropping affected yield mainly by increasing soil moisture and regulating illumination intensity among maize population .