“双行交错”种植方式玉米干物质积累动态变化的研究

Research on Dynamic Variation of Dry Matter Accumulation in Maize Cultivated by "Double-row Interlaced Planting" Method

以郑单958为试验材料,采用三种种植方式比较其干物质积累动态变化,探索＂双行交错＂种植方式玉米增产机理。结果表明：＂双行交错＂种植方式玉米根的数量和干物重明显提高,茎秆粗壮。播种50 d后＂双行交错＂种植方式的玉米群体干物质积累比＂双行平行＂和＂单行等距平行＂的分别高25%-40%和60%~80%。结论是：＂双行交错＂种植方式玉米可合理地协调密度增加后群体和个体之间的矛盾,是目前我国玉米栽培历史上的一次革命,为我国玉米栽培上继续增加密度、获得高产创出了一条崭新途径。

Three planting forms（SHJC,SHPX,PX） were used to study the dynamic variation of dry matter accumulation and explore the yield increasing mechanism of maize cultivated by ＂Double-row Interlaced Planting＂（SHJC） with the variety Zhengdan 958 as material.The results showed that the root number and dry matter weight increased obviously and the stem was thick and strong when the maize cultivated by SHJC method.After seeding for 50 days,the accumulated dry matter of maize cultivated by SHJC was 25% ~ 40% and 60% ~ 80% more than that of maize cultivated by SHPX and PX methods respectively.In conclusion,the SHJC cultivating method could reasonably coordinate the contradiction between population and individual,and was a revolution in cultivation history of China,which provided a new pathway to obtain high yield by increasing plant density.