河北玉米新品种穿刺强度和压碎强度比较

目的]比较河北玉米新品种的穿刺强度和压碎强度。方法]采用随机区组设计,利用茎秆强度测定仪对河北12个品种进行茎皮穿刺强度和茎秆压碎强度研究。结果]大喇叭口期不同品种间茎秆穿刺强度有一定差异,其中8号品种最强,而4号品种最弱;灌浆期不同品种抗折能力无差异;乳熟期9号品种穿刺强度最强,而7号品种最弱。12号品种的压碎强度最高、最抗压,而11号品种最低,抗压能力最差。测量茎秆穿刺强度适宜在抽雄期第6节间进行。参试的12个品种中,8号和9号品种的综合抗倒能力最强。结论]该研究为筛选抗倒能力强的玉米品种提供了理论基础。

Comparison of Puncture Strengths and Crushing Strengths of New Corn Cultivars in Hebei Province

Objective] To compare the puncture strengths and crushing strengths of new corn cultivars in Hebei Province.Method] Random blocks design was adopted to research the puncture strengths and crushing strengths of 12 new corn cultivars in Hebei Province by stalk strength tester.Result] In bell stage,there were certain differences in puncture strengths between cultivars.Among them,cultivar 8 had the strongest puncture strength while cultivar 4 was the poorest.In filling stage,there were no differences in the fracture resistance between cultivars.In milk ripe stage,ctltivar 9 had the strongest puncture strength,while cuhivar 7 was the poorest.As for crushing strength,cultivar 12 was the highest while cultivar 11 was the lowest.It was more suitable to detect the puncture strength on the 6th node at tasseling stage.Among the 12 cultivars,cultivar 8 and 9 showed the strongest comprehensive resistance to lodging.Conclusion] This research provides theoretical basis for the screening of corn cultivars with strong resistance to lodging.