Study on the Composition and Stability of Soil Aggregates with Different Tea Plantation Age

LIU Min-ying; ZHENG Zi-cheng; LI Ting-xuan

doi:10.13305/j.cnki.jts.2012.05.007

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Journal of Tea Science ›› 2012, Vol. 32 ›› Issue (5) : 402-410. DOI: 10.13305/j.cnki.jts.2012.05.007

Study on the Composition and Stability of Soil Aggregates with Different Tea Plantation Age

LIU Min-ying, ZHENG Zi-cheng, LI Ting-xuan^*

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Abstract

For the purpose of investigating the effect of tea plantation age on the soil aggregates composition and stability, the field data of tea planted area was collected and laboratory analysis was conducted. Results showed that: (1) In the dry and wet treatments dynamic changes were observed in the amount of soil aggregates with the change in clay diameter. It was found that the decreasing trend in the amounts of micro-aggregates was followed a decrease-increase-decrease trend with the decrease in clay diameter under dry treatment, and show a decrease-increase-decrease trend with the decrease in clay diameter under wet treatment. The amounts of micro-aggregates were decreased with the decrease of clay diameter. Results showed that there were no significant effects of tea plantation age on the soil micro-aggregates. (2) When the clay diameter was >5mm, it was found that the increasing trend in the amount of dry and water-stable aggregates was followed an increase decrease trend with the increase of planting time and the maximum value was found after 20~22 years of tea plantation age. At the same time <5mm of clay diameter displayed an opposite trend as compare to >5mm diameter. (3) The maximum value of MWD, GMD of dry-aggregates and water-stable aggregates were found at tea plantation age of 20~22, and the result is opposite for aggregate fractal dimension value (D value) of soil aggregates. The differences among GMD, MWD and aggregate fractal dimension were highly significant under different planting age, which indicated that the tea plantation age showed significant effect on the soil aggregate stability.

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composition / soil aggregates / stability / tea plantation age

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LIU Min-ying, ZHENG Zi-cheng, LI Ting-xuan. Study on the Composition and Stability of Soil Aggregates with Different Tea Plantation Age[J]. Journal of Tea Science. 2012, 32(5): 402-410 https://doi.org/10.13305/j.cnki.jts.2012.05.007

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