不同耕作方式保水剂对夏玉米生长发育的影响

为了明确不同耕作方式保水剂在豫东旱地夏玉米上应用效果，以‘郑单958’为试验材料，研究了其对夏玉米生长发育发育的影响。结果表明：与对照相比，不同处理提高了夏玉米的出苗率、根条数、叶面积指数和干物质积累量；夏玉米生育前期沟播覆盖保水剂效果最好，沟播保水剂次之；后期沟播覆盖保水剂最好，覆盖保水剂次之；不同处理使夏玉米产量比对照提高9.59%~54.6%，沟播覆盖保水剂最好，增产54.6%，覆盖保水剂次之，增产51.03%。表明沟播覆盖保水剂改善了夏玉米出苗和根系状况，提高了叶面积指数和干物质积累量，从而达到增产的目的。

Effects of Different Cultivation and Water Retaining Agent on Summer Maize Growth and Development

An investigation was made at upland in eastern Henan Province to understand the effects of furrow sowing, water retaining agent and straw mulching, on summer maize growth, and development. The results showed that: Compared to control, all the measures promoted summer maize emergence rate, root numbers, LAI and dry matter accumulation. In the earlier stage of summer maize growth times, the measure of sowing mulching water retaining agent had the best effect, followed by sowing water retaining agent. In the late stage, the measure of sowing mulching water retaining agent also had the best effect, followed by mulching water retaining agent. Different treatments increased the grain yield by 9.59%-54.6%, The yield increment was the greatest ( 54.6% ) by the sowing mulching water retaining agent, followed by mulching water emergence and root status, promoted the LAI and dry matter accumulation, increased the grain yield of summer maize.