沙土底墒与灌水量对玉米苗期生长发育的影响

在玉米盆栽试验条件下,采用二次回归正交设计,建立了沙土苗期土壤水分与株高和干重等参数关系的数学模型,得出了各参数最高条件下的最适宜底墒和最优灌水量。试验结果表明:底墒为13.3%,苗期灌水量为76.6 mm时,株高最高;底墒为11.8%,苗期灌水量为76.3 mm时,总干重最高;底墒为10.3%,苗期灌水量为70.2 mm时,根部干重重量最高;底墒为13.7%,苗期灌水量为138.3 mm时,茎端干重重量最高。

Effects of Soil Moisture and Irrigation Quantity on Maize Growth and Development at Seedling Stage

The quadratic regression orthogonal design was used the maize pot test to establish the mathematical models between irrigation quantity and plant height,dry weights of stem,roots and plant under different soil moisture for getting the optimum soil moisture and irrigation quantity under the maximum parameters of plant height and dry weights of plant,stem and root.The results show that the highest plant height,plant dry weight,root dry weight and stem dry weight can be obtained under 13.3% soil moisture and 76.6 mm irrigation quantity,11.8% soil moisture and 76.3 mm irrigation quantity,10.3% soil moisture and 70.2 mm irrigation quantity and 13.7% soil moisture and 138.3 mm irrigation quantity respectively.