论文部分内容阅读
通过根箱试验获取玉米根系坐标数据,采用方程y=1/1/k+ae~-bx建立根系纵向和横向分布模型,利用模型分析田间氮肥运筹以及不同品种对玉米根系生长及分布的影响,研究玉米根系在土壤中的空间分布特性。结果表明,玉米在拔节期和灌浆盛期,分别约49.7%和20.7%的根系分布在20 cm深度土层内,34.6%和46.6%根系分布在20 cm横向范围内,其纵向和横向累积长度的变化均可用Logistic方程模拟。重基肥处理能够扩大拔节期的根系的空间分布。
The corn root coordinate data were obtained by root box experiment. The vertical and horizontal root distribution models were established by using the equation y = 1/1 / k + ae ~ -bx. The model was used to analyze the effects of nitrogen fertilizer application and different varieties on the growth and distribution of maize roots. Study on the Spatial Distribution of Maize Roots in Soil. The results showed that about 49.7% and 20.7% of the maize roots were distributed in depth of 20 cm in jointing stage and filling stage, respectively. 34.6% and 46.6% of the roots were distributed in the horizontal direction of 20 cm, and the accumulated length Logistic equation can be used to simulate changes. Heavy basal fertilizer treatment can increase the spatial distribution of root system at jointing stage.