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首页> 外文期刊>Journal of Turfgrass Management >Physical Properties of Sand as Affected by Clinoptilolite Zeolite Particle Size and Quantity
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Physical Properties of Sand as Affected by Clinoptilolite Zeolite Particle Size and Quantity

机译：斜发沸石分子筛粒径和数量对砂的物理性质的影响

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摘要

Little is known about how the particle size of amendments influences the physical properties of amendment-sand mixtures. In two laboratory experiments, the amendment clinoptilolite zeolite (CZ) was used to amend sand at two sand:CZ ratios of 5 and 10(w/w) and six CZ particle sizes, including: >1 mm, 1 to 0.5 mm, 0.5 to 0.25 mm, 0.25 to 0.105 mm, 0.105 to 0.047 mm and <0.047 mm. Saturated hydraulic conductivity (SHC) ranged from 3 to 48 cm hr~(-1), decreased with the decreasing CZ particle size whichwas most noticeable at the finest CZ particle size. The water content of CZ-sand mixtures at soil matric potentials from -3 kPa to -10 kPa increased with decreasing CZ particle size. Bulk density of the CZ-sand mixtures (except for CZ-mixtures < 0.047 mm) ranged from 1.37 to 1.42 g cm~(-3), which were significantly (p = 0.01) lowered than the unamended sand (1,48 g cm~(-3)). Sand amended with 10% of the finest CZ particle size had the lowest total porosity (41.5 g Kg~(-2)). Aeration porosity (at -3 kPasoil matric potential) of the mixtures containing coarse CZ particles (>0.25 mm) ranged between 35 and 38% (v/v), similar to the unamended sand. In humid regions where higher SHC is necessary for good drainage and aeration, CZ particle sizes >0.25 mm would be desirable to amend a sand of this nature. However, in arid area where water is limited, sand could be amended with finer CZ particle sizes (0.25-0.047 mm) to increase water holding capacity of the putting green root zone media while still maintaining a moderately high SHC.
机译：关于改性剂的粒径如何影响改性剂-砂混合物的物理性质，人们所知甚少。在两个实验室实验中，使用改性斜发沸石（CZ）以两种砂子：CZ比率为5和10（w / w）以及六种CZ粒径来修正砂子，包括：> 1 mm，1到0.5 mm，0.5至0.25mm，0.25至0.105mm，0.105至0.047mm和＜0.047mm。饱和水力传导率（SHC）范围为3至48 cm hr〜（-1），随着CZ粒径的减小而减小，这在CZ粒径最好的情况下最为明显。 CZ-砂混合物的水含量在-3 kPa至-10 kPa的土壤基质电位下随CZ粒径的减小而增加。 CZ砂混合物的体积密度（<0.047 mm的CZ混合物除外）在1.37至1.42 g cm〜（-3）之间，比未修正的砂土（1.48 g cm）显着降低（p = 0.01） 〜（-3））。用最佳CZ粒度的10％修正的砂的总孔隙率最低（41.5 g Kg〜（-2））。含有未加工的CZ粗颗粒（> 0.25 mm）的混合物的充气孔隙率（在-3 kPasoil基质势下）介于35％和38％（v / v）之间。在潮湿的地区，为了获得良好的排水和通气，必须使用更高的SHC，CZ粒度> 0.25 mm可能是需要的。但是，在缺水的干旱地区，可以使用更细的CZ粒径（0.25-0.047毫米）来修正沙子，以增加推杆生根区介质的持水能力，同时仍保持适度的高SHC。

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