地下水位对陆稻根系生长的影响

Effect of groundwater level on growth and development of upland rice root system

对不同地下水位下生长的陆稻作了成熟期根系生长特性的研究结果表明 :不同地下水位下生长的陆稻根系垂直分布深度无多大差别 ,均在 0 cm～ 60 cm间 ;根长、根重、根体积、根密度 ,一般随根系垂直分布深度的增加而递减 ;根系总量、各层分布量及各层分布量占总量百分比 ,均随处理水深增加而增加 ,且深根 (30 cm～ 60 cm)的各参数值 ,达差异极显著 ;三种处理的活跃表面积 /总表面积均随垂直深度增加而递减。

The growth and development parameters of upland rice system during the mature period were studied in various groundwater levels. The results were as follows: The vertical distribution depth of upland rice root system in various groundwater levels was not much different, while its depth was generally between 0 cm^60 cm. Root length, root dry weight, root volume and root density decreased gradually with the increase of root system vertical distribution depth. 3. Total quantity of root system, the distribution of every layer and the rate of the distribution of every layer and total quantity of root system increased with the increase of the groundwater depth, and the parameters of deep layer (between 30 cm^60 cm) root had significant difference; the rate of active area and total area of root surface of the three treatment decreased with the increase of root system vertical depth.