免储水灌注水播种条件下保水剂使用对玉米生长发育的影响

通过大田试验研究了民勤绿洲免储水灌注水播种条件下施用保水剂对大田玉米的生长发育状况的影响.结果表明,注水播种配合使用保水剂可使玉米提早出苗,提高叶面积指数,促进干物质积累,提高穗干物质分配比例,提高玉米籽粒产量和生物产量.施用保水剂量为2.5 g/m2和采用保水剂拌种注水播种处理较常规灌溉处理可分别增产17.77%和15.13%,节水18.76%和13.92%,增收26.37%和15.73%,水分利用效率达到3.33和3.07 kg/m3.

Effect of Water Retaining Agent on Growth and Development of Maize Under Condition of Water-saving Irrigation

The effect of water retaining agent on growth and development of maize was studied by a field experiment under the condition of sowing with water,a water-storing absolved irrigation,in Minqin Oasis. Results show that the technology of sowing with water and the application of water-holding agent enable early emergence,enhance leaf area index,promote the accumulation of dry matter,improve the ratio of panicle dry matter distribution,and improve maize grain yield and biological yield. Compared with the CK,applying water absorbent of 2.5 g/m² and using sowing seed dressing can increase yield by 17.77 % and 15.13%,save water by 13.92% and 18.76%,increase farmer's income by 15.73% and 26.37%,and increase water use efficiency by 3.33 and 3.07 kg/m³,respectively.