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首页> 外文期刊>Forest Ecology and Management >Soil water storage changes in a small headwater catchment in the central North Island of New Zealand following afforestation with Pinus radiata
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Soil water storage changes in a small headwater catchment in the central North Island of New Zealand following afforestation with Pinus radiata

机译：新西兰中央北岛中北岛的小型落地集水区的土壤储水变化

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摘要

The effect of afforestation of pasture with Pinus radiata D. Don on soil water storage was measured in a small headwater catchment (8.7 ha) located in the Central North Island of New Zealand, as part of a larger study of land use effects on streamflow. Soil water content of the pumice soil was measured on an approximately monthly basis at 10 cm intervals to approximately 200 cm depth to the ignimbrite rock layer, using a neutron probe. Measurements occurred between stand ages 2-8 years (1975-1982) during which time the leaf area index of the forest was measured annually. Soil water storage in the profile varied between relatively narrow limits, with annual mean storage ranging from 766 to 878 mm even though annual rainfall and streamflow varied considerably between years. Soil water storage was more variable on a monthly basis, decreasing to approximately 630 mm in the entire profile during the summer drought in 1978 when streamflow almost ceased. The pumice soil at Puruki stored sufficient water in the profile to meet annual evapotranspiration requirements of P. radiata, including during a summer drought when water stored below 100 cm depth was utilised. The root systems of P. radiata trees can extend to below 3 m depth when growing on pumice soils in the Central North Island and plantations will therefore not be water limited unless roofing depth is impeded or annual rainfall decreases substantially in future owing to climate change.
机译：牧场造林与碱弧菌D. DIN在土壤储水中的效果在位于新西兰北部北岛的小型落地集水区（8.7公顷）中，作为较大研究对流流的较大研究的一部分。使用中子探针，在10cm间隔的约10cm间隔的情况下以10cm间隔的约200cm深度测量浮石的土壤含水量。在2-8岁（1975-1982）之间的展台之间发生的测量期间，每年测量森林的叶面积指数。轮廓在型材中的土壤储水在相对狭窄的限度之间变化，年平均值范围从766到878毫米，即使年降雨量和流出多年之间会变化很大。 1978年夏季流动几乎停止时，土壤储水在每月夏季干旱期间，整个概况中的整个概况中的储存量更大。 Puuki的浮石土壤在型材中储存了足够的水，以满足P. Radiata的年蒸散要求，包括在使用低于100厘米深度的水中的夏季干旱期间。当中央北岛和种植园的浮石土壤上，辐射树木的根系达到3米以下的深度低于3米的深度，因此由于气候变化，除非屋顶深度受阻或年降雨量，除非屋顶深度造成的屋顶深度降低。

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