【摘要】 通过对红枣(Ziziphus zizyphus)盛果期根系空间分布规律进行研究,为红枣田间水肥管理提供理论依据。采用剖面挖掘和分层取样法,利用WinRHIZO Pro2010a根系分析系统对漫灌条件下红枣盛果期吸收根(根径<2 mm)的空间分布进行了分析。结果表明,根系在水平方向上(0~450 cm)随着树干水平距离的增加而减少,水平距离0~200 cm以内是根系分布的主要区域;根系在垂直方向上(0~170 cm)随着土层垂直距离的增加先增多后减少,垂直距离0~90 cm以内是根系分布的主要区域。水平距离0~200 cm以内、垂直方向0~90 cm以内土层是红枣盛果期田间水肥管理的重要区域,土壤质地条件是影响根系分布的重要因素之一。更多还原

【Abstract】 Based on the study of spatial distribution characteristics of root system of Ziziphus zizyphus at full bearing period,the theoretical basis for water and fertilizer management of Ziziphus zizyphus was provided. With profile digging and layered sampling methods, the spatial distribution of absorbing roots(root diameter < 2 mm) of Ziziphus zizyphus at full bearing period was investigated and analyzed under the condition of flood irrigation by using WinRHIZO Pro2010a root analysis system.The results showed that the roots in the rows decreased with the distance increased from the trees in horizontal direction(0~450 cm). The horizontal direction of 0~200 cm is concentrated region for roots distributing. In vertical direction(0~170 cm),the roots in the rows first increased and then decreased with increase of depth. The vertical direction of 0~90 cm is concentrated region for roots distributing. The 0~90 cm soil layer in the 0~200 cm from the trees is important for water and fertilizer management in Ziziphus zizyphus at full bearing period. Meanwhile, the soil texture condition was an important factor affecting the spatial distribution of roots.更多还原