春季深松对内蒙古西部农田土壤结构及玉米产量的影响

试验在春季条带深旋耕30cm、春季深松30cm和常规表层旋耕15cm等不同深松方式下,测定土壤容重、田间持水量、土壤含水量以及玉米农艺性状和产量等各指标,通过分析阐明春季深松对农田土壤结构的影响。试验结果表明:30cm春季条带深旋耕和30cm春季深松能有效的打破犁底层,扩大耕层深度,显著降低了土壤紧实度和15~35cm土层土壤容重;增加了土壤田间持水量及土壤含水量;深松能提高玉米株高、单株根干重、单株地上干物质重和叶面积指数,加快生育进程;在收获时,30cm条带深旋耕、30cm春季深松的倒折率(0和1.2%)均低于常规旋耕处理(3.3%);深松有效增加玉米单产,30cm春季条带深旋耕和30cm春季深松处理较常规旋耕分别增产22.10%和25.93%。

Effect of Subsoiling in spring on Farmland Soil Structure and Maize Yield in Western Inner Mongolia

The deep tillage was carried out in spring by the deep rotary tillage 30 cm,the deep tillage 30cm and the shallow tillage spin 15 cm.and the soil bulk density,soil water content,the field moisture capacity,the agronomic traits and yield of maize were measured,respectively.The results showed that he rotary tillage 30 cm,the deep tillage 30cm can effectively break the plow pan,and reduced substantially soil density and soil bulk density for 15-35cm soil layer,however,the soil moisture increased.The plant length,the root dry weight,the overground plant dry weight and the LAI improvemented under different deep tillage treatment.The breaking rate of the deep tillage was reduce under different deep tillage treatment in harvest time.The maize yield increased by 22.10% and 25.93%,respectively,compared with the control.