Effect of Different Intensive Management Durations on Soil Phosphorus Fractions in Lei Bamboo (Phyllostachys praecox) Forest

XU Xiaoli1; 2; YANG Xing1

doi:10.13870/j.cnki.stbcxb.2018.01.035

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Effect of Different Intensive Management Durations on Soil Phosphorus Fractions in Lei Bamboo (Phyllostachys praecox) Forest

更新时间：2025-03-12

- Effect of Different Intensive Management Durations on Soil Phosphorus Fractions in Lei Bamboo (Phyllostachys praecox) Forest
- Vol. 32, Issue 1, Pages: 225-231(2018)
- 作者机构：
  
  1. 1．浙江省土壤污染生物修复重点实验室,杭州,311300
  2. 2．浙江农林大学环境与资源学院,杭州,311300
  3. 3．佛山科学技术学院环境与化学工程学院,广东,佛山,528000
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2018.01.035
  CLC： S157.4
- Published：2018
- 稿件说明：
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XU Xiaoli1, 2, YANG Xing1. Effect of Different Intensive Management Durations on Soil Phosphorus Fractions in Lei Bamboo (Phyllostachys praecox) Forest[J]. 2018, 32(1): 225-231.
DOI：

XU Xiaoli1, 2, YANG Xing1. Effect of Different Intensive Management Durations on Soil Phosphorus Fractions in Lei Bamboo (Phyllostachys praecox) Forest[J]. 2018, 32(1): 225-231. DOI： 10.13870/j.cnki.stbcxb.2018.01.035.

摘要

为研究不同集约经营年限下雷竹林土壤的磷形态特征，采集分别经营3，9，15年的雷竹林上层（0—20 cm）和下层（20—40 cm）土壤样品，测定土壤pH、有机碳、全磷（TP）、Olsen P、Mehlich-3 P等理化性质，并采用改进的Hedley分级法分析土壤中不同形态磷的含量。结果表明：在集约经营9，15年后，上层土壤pH低于雷竹正常生长范围，且有酸化深层化现象；土壤有机碳主要在上层土壤中积累，经营15年为各处理中最高，较3年提高了183%。上、下层土壤TP、Olsen P、Mehlich-3 P、活性磷（H2O-P+NaHCO3-Pi+NaHCO3-Po）和中稳性磷（NaOH-Pi+NaOH-Po）含量均随经营时间逐渐增加。与3年相比，集约经营15年后活性磷和中稳性磷占总磷百分比在上层土壤中提高了63%和83%，在下层土壤中提高了88%和128%；而上、下层土壤难溶性磷（HCl-P+Res-P）所占百分比则分别从58%和66%降低至26%和29%，难溶性磷的含量基本不变。由此可见，持续、大量施用磷肥提高了雷竹林土壤中活性磷和中稳性磷比例。此外，Mehlich-3 P-H2O-P拟合方程推测上、下层土壤均有可能已发生磷酸盐流失。因此，雷竹林集约经营过程中应注意合理施肥，以免造成磷流失。

Abstract

To investigate the characteristics of soil phosphorus forms in Phyllostachys praecox stands

samples of upper (0-20 cm) and lower (20-40 cm) soil layers were collected from fractions which were intensively managed for 3

9 and 15 years

respectively. The soil physo-chemical properties such as pH

soil organic carbon (SOC)

total phosphorus (TP)

Olsen P

and Mehlich-3 P were determined. Additionally

the concentrations of different phosphorus fractions were measured with modified Hedley’s sequential extraction procedures. The results showed that the pH of top soil significantly decreased in the 9- and 15-year intensive management plots where acidifications of subsurface soil were observed. The SOC mainly accumulated in the top soil layer

and the highest SOC content was observed in the 15-year intensive management stands

which increased by 183% compared to the 3-year intensive management plots. Moreover

the contents of TP

Olsen P

Mehlich-3 P

labile P (H2O-P+NaHCO3-Pi+NaHCO3-Po) and moderately labile P (NaOH-Pi+NaOH-Po) in both soil layers all increased with the prolonging of plantation time. Compared with the 3-year intensive management plots

the proportion of labile P and moderately labile P in the 15-year intensive management stands increased by 63% and 83% for topsoil layer

and 88% and 128% for the lower soil layer

respectively

however

the proportions of sparingly labile P (HCl-P+Res-P) decreased from 58% to 26% for topsoil layer and from 66% to 29% for lower soil layer

respectively

whereas the contents of sparingly labile P had no significant difference between these two treatments. Thus

applied phosphorus fertilizer was mainly built up in the labile P and moderately labile P fractions under the P. praecox stands. According to the Mehlich-3 P-H2O-P linear equation

we could speculate that phosphorus loss may have occurred in both soil layers. Therefore

fertilization should be properly managed in P. praecox stands to avoid excessive phosphorus loss.

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