摘要
为了缓解因气候变化产生的播种期干旱对夏玉米幼苗发育的不利影响,以'郑单958'为试验材料,在河南省许昌市灌溉试验站,采用不同底墒条件和麦茬处理方式,研究不同处理组合对播种层土壤水分和玉米苗期生长发育的差异.结果表明:土壤含水量随着土层的变深而增大,表现为偏湿平茬＞正常平茬＞偏湿除茬＞偏干平茬＞正常除茬＞偏干除茬.SP4D值、光合速率及产量变化趋势一致,均表现为正常平茬＞偏湿平茬＞偏湿除茬＞正常除茬＞偏干平茬＞偏干除茬.因此,平茬相比除茬可以更好地改善土壤水分环境,提高玉米的出苗率、光合速率和产量,可以在生产中进行广泛推广应用.
Abstract
In order to mitigate the adverse effects of drought on the development of summer maize seedlings caused by climate change,using'Zhengdan 958'as experimental material,the effects of different treatment combinations on soil moisture and growth of maize seedling were studied.The results showed that the soil moisture content increased with the depth of the soil layer,and the pattern was moist soil,wheat straw returning to the field＞normal moisture content,wheat straw returning to the field＞moist soil,wheat straw not returning to the field＞dry soil,wheat straw returning to the field＞normal moisture content,wheat straw not returning to the field＞dry soil,wheat straw not returning to the field.SPAD value,photosynthetic rate and yield showed the same trend,normal moisture content,wheat straw returning to the field＞moist soil,wheat straw returning to the field＞moist soil,wheat straw not returning to the field＞normal moisture content,wheat straw not returning to the field＞dry soil,wheat straw returning to the field＞dry soil,wheat straw not returning to the field.Therefore,compared with the removal of stubble,plain stubble can better improve the soil water environment,increase the emergence rate and photosynthetic rate of maize,and increase the yield,which can be widely applied in production.
基金项目
国家重点研发计划任务(2022YFD2300805)
河南省科技攻关项目(32102520005)
河南省农业科学院基础性科研项目(2023JC09)
河南省引智项目(2023)()
NETL
NSTL
万方数据