条带深旋小双行精播技术对夏玉米产量调控效应研究

以京农科728和天塔619为试验材料,研究玉米条带深旋小双行精播技术对黄淮海平原夏玉米产量的调控效应。结果表明,条带深旋后0~10cm土层容重降低6.64%~17.42%。夏玉米吐丝期叶面积指数提高26.78%~46.11%（P<0.05）,拔节前、拔节-吐丝和吐丝后净同化率分别提高16.27%~25.82%、5.23%~35.41%和3.83%~31.40%,干物质积累量显著提高。条带深旋小双行精播处理的夏玉米有效穗数增加19.73%~24.68%（P<0.05）,穗长增长、秃尖长缩短、有效穗长显著增长,行粒数和穗粒数显著增加,而千粒重显著降低,夏玉米实际产量和理论产量均显著提高。

Regulation Effects of Narrow-Double Row Precision Sowing with Subsoiling on Yield in Summer Maize

In order to study the regulation effects of the narrow-double row precision sowing with subsoiling on maize yield, a field experiment was conducted by using Jingnongke 728 and Tianta 619 as the testing materials. The results showed that the soil bulk density in 0-10cm depth was reduced by 6.64%-17.42%. Summer maize leaf area index were increased by 26.78%-46.11% (P<0.05), while net assimilation rates during emergence to 6 leaf, 6 leaf to silking and silking to maturity were increased by 16.27%-25.82%, 5.23%-35.41% and 3.83%-31.40%, respectively. Therefore, summer maize dry matters increased significantly. Under the treatment of narrow-double row precision sowing with deep-spinning, summer maize ear number were increased by 19.73%-24.68% (P<0.05), and the ear length increased, bald-tip length shortened, row grain number and ear grain number increased significantly, but the 1000-grain weight decreased significantly, so that both the actual and theoretical yields of summer maize increased significantly.