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首页> 外文期刊>Plant and Soil >Root development of 'Red Lady' papaya plants grown on a hillside.
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Root development of 'Red Lady' papaya plants grown on a hillside.

机译：在山坡上种植的“红夫人”木瓜植物的根系发育。

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Pawpaw cv. Red Lady seedlings were grown for 7 weeks in one experiment and 17 weeks in a second experiment on a 60-70% sloped hillside. Rooting depth and lateral root developmental characteristics were determined to establish a more informed basis for developing management procedures during hillside production of pawpaws. A trench was dug perpendicular to the contour line, and positioned 10 cm from the stem base of each plant. A 1-cm layer of soil was removed from the profile wall, and the roots onthe trench profile were mapped. Thereafter, the intact half of each root system was excavated to determine the dry mass and length distribution. Roots were separated into the taproot system, and the lateral roots of the uphill and downhill sides. The downhill portion of lateral roots accounted for 56% of total length and 64% of total mass after 7 weeks, and 71% of total length and 69% of total mass after 17 weeks. Some lateral roots on the uphill side of the plants developed with a negative gravitropicorientation to maintain a portion of the root system, close to the surface of the slope. After 17 weeks, 34% of the roots on the uphill side of the trench profile walls were located above a horizontal plane positioned at the stem base. These results suggest that there may be no need to modify fertilizer placement practices for hillside production of pawpaws. However, the higher concentration of roots on the downhill side of these plants indicates a need for placement of soil moisture sensors for irrigation scheduling on uphill and downhill sites.
机译：木瓜简历在一个实验中，红夫人幼苗在60-70％的倾斜山坡上生长了7周，在第二个实验中生长了17周。确定生根深度和侧根发育特征，为在爪子的山坡生产过程中制定管理程序建立更明智的基础。垂直于轮廓线挖出一条沟渠，该沟渠距每株植物的茎根10 cm。从型材壁上移除1厘米厚的土壤层，并绘制沟槽型材上的根。此后，挖出每个根系完整的一半，以确定干重和长度分布。根被分为主根系统和上，下坡的侧根。 7周后，侧根的下坡部分占总长度的56％，占总质量的64％; 17周后，占总长度的71％，占总质量的69％。植物上坡侧的一些侧根以负的重力取向发育，以保持根系的一部分，靠近斜坡表面。 17周后，沟槽轮廓壁上坡侧的根部中有34％位于茎基部的水平面上方。这些结果表明，对于木瓜的山坡生产，可能无需修改肥料的施用方式。但是，这些植物的下坡侧的根部浓度较高，这表明需要在上坡和下坡地点放置土壤水分传感器以进行灌溉计划。

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