CAJ | 학술논문

　　通过深松和播期对玉米冠层结构的调控，分析深松与旋耕条件下不同播期群体冠层结构特点，明确塑造高产群体冠层结构的耕作方式及适宜播期。采用裂区设计，主区耕法设2个水平(深松与旋耕)，副区播期设3个水平(4月25日、5月10日和5月25日)，研究深松与不同播期对玉米冠层结构及产量性状的影响。结果表明，深松可适当延长玉米生育进程，对玉米植株形态、叶面积指数(LAI)、群体光合势(LAD)、干物质积累特征参数及产量的影响均表现为深松>旋耕(CK)；播期处理间其冠层结构、产量及产量构成因素存在显著差异，表现为早播>中播>晚播；随着播期推迟，早播(4月25日)产量较5月10日、5月25日分别提高3.61%和43.38%。说明深松条件下早播利于群体形成合理的冠层结构，可有效提高玉米产量。
　　통과심송화파기대옥미관층결구적조공，분석심송여선경조건하불동파기군체관층결구특점，명학소조고산군체관층결구적경작방식급괄의파기。채용렬구설계，주구경법설2개수평(심송여선경)，부구파기설3개수평(4월25일、5월10일화5월25일)，연구심송여불동파기대옥미관층결구급산량성상적영향。결과표명，심송가괄당연장옥미생육진정，대옥미식주형태、협면적지수(LAI)、군체광합세(LAD)、간물질적루특정삼수급산량적영향균표현위심송>선경(CK)；파기처리간기관층결구、산량급산량구성인소존재현저차이，표현위조파>중파>만파；수착파기추지，조파(4월25일)산량교5월10일、5월25일분별제고3.61%화43.38%。설명심송조건하조파리우군체형성합리적관층결구，가유효제고옥미산량。
According to the regulate and control of subsoiling and sowing dates on canopy structure in maize, canopy structure characters of deep loosening and rotary tillage in different sowing dates were analyzed and molding canopy structure of cultivation methods and suitable seeding dates in high yield population were clarified in the experi-ment. In order to study the effect of subsoiling and rotary tillage on canopy structure and yield performance in different sowing dates on maize. Two levels were assigned to the main plot(subsoiling and rotary tillage) and three to the sub-plot(April 25th, May 10th and May 25th), in a split plot design. The results showed that deep loosening could delay the growth process of maize appropriately, and the effect of plant morphological, leaf area index(LAI) characteristic param-eter, group photosynthetic potential(LAD), the maximum of dry matter accumulation characteristic parameter and yield were all showed that subsoiling was higher than rotary tillage;while there were significant difference of canopy struc-ture, yield and yield component among sowing dates, which manifested as early sowing>medium sowing>late sowing. Compared May 10th to May 25th, yield of early sowing(April 25th) increased 6.25%and 42.94%respectively with the sowing date delayed. Population structure was reasonable in the condition of deep loosening and early sowing. The re-sult showed that subsoiling was beneficial to form reasonable canopy and increasing the yield of maize effectively.