黄欢, 何丙辉, 李建兴, 秦川, 姚云. 网格式生物埂对坡面土壤养分分布特征的影响[J]. 中国生态农业学报(中英文), 2013, 21(12): 1491-1499. DOI: 10.3724/SP.J.1011.2013.30474
引用本文: 黄欢, 何丙辉, 李建兴, 秦川, 姚云. 网格式生物埂对坡面土壤养分分布特征的影响[J]. 中国生态农业学报(中英文), 2013, 21(12): 1491-1499. DOI: 10.3724/SP.J.1011.2013.30474
HUANG Huan, HE Bing-Hui, LI Jian-Xing, QIN Chuan, YAO Yun. Effect of net terrace biological bank on soil nutrients distributions along slope[J]. Chinese Journal of Eco-Agriculture, 2013, 21(12): 1491-1499. DOI: 10.3724/SP.J.1011.2013.30474
Citation: HUANG Huan, HE Bing-Hui, LI Jian-Xing, QIN Chuan, YAO Yun. Effect of net terrace biological bank on soil nutrients distributions along slope[J]. Chinese Journal of Eco-Agriculture, 2013, 21(12): 1491-1499. DOI: 10.3724/SP.J.1011.2013.30474

网格式生物埂对坡面土壤养分分布特征的影响

Effect of net terrace biological bank on soil nutrients distributions along slope

  • 摘要: 网格式生物埂作为将水土保持生物措施与工程措施相结合的一种新型护坡技术, 对土壤养分特征和坡面分布规律有较大影响。本文采用野外调查和室内分析方法, 研究建设1~4年的黄花网格式生物埂对坡面土壤养分分布特点和分布规律的影响。结果表明: (1)网格式生物埂对土壤有机质含量和pH有显著改善作用, 随着建设年限的增加, 土壤pH逐渐降低, 而土壤有机质含量逐渐增大; 在不同坡位之间有机质含量表现为: 坡上>坡中>坡下, 与对照裸坡呈相反规律; (2)随着网格式生物埂建设年限的增加, 土壤全氮呈现先降低后增加的趋势, 且生物埂对于改善上坡位氮素含量效果较显著; 土壤碱解氮与全氮含量变化呈显著正相关, 且不同建设年限间生物埂土壤碱解氮含量在坡上和坡下位置差异均较显著; (3)生物埂建设1~3年, 相同年限的生物埂不同坡位的土壤全磷含量之间显著差异性规律不同, 但建设4年生物埂土壤全磷的坡面分布规律与对照完全相反, 表现为坡下>坡中>坡上, 且不同坡位差异达极显著水平(P=0.000); 有效磷含量随生物埂建设年限增加表现出一定的波动性, 变异系数达31.37%, 但相比对照平均值提高1.15~3.30倍, 而坡面分布随建设年限没有明显的变化规律; (4)网格式生物埂土壤全钾含量相比对照提高9.7%~28.2%, 但随着网格式生物埂建设年限的增加, 土壤全钾含量呈降低趋势; 生物埂能显著增加土壤有效钾含量, 且达到一定建设年限, 坡面不同位置土壤有效钾含量差异性显著增加。

     

    Abstract: As a new slope protection technique, net terrace biological bank combines biological measures with engineering practices for soil/water conservation. They significantly influence soil nutrient contents and distribution patterns along slope. The technique has made it possible to realize full uses of land resources and ensure maintenance of ecological and economic benefits under insufficient supply of arable land resources against vast slope of varying lengths. To study soil nutrients distributions in different slope positions and to provide theoretical basis to further promote net terrace biological bank and artificial regulation of slope-protection economic vegetation, this article analyzed the impact of net terrace biological bank on soil nutrient distribution patterns on slope. It also determined the soil nutrients contents in net terrace biological bank with different construction years using field investigation and indoor experimental methods. The results showed that: (1) net terrace biological bank significantly changed soil pH and organic matter content. Also while soil pH decreased with increasing construction years, organic matter content significantly increased. The distribution pattern of organic matter along slope changed significantly, with that of the upper part > middle part > lower part of slope in all construction period. However, the trend of organic matter content change under the control (bare slope) tracked the reverse pattern. (2) With the increasing construction years of net terrace biological bank, total nitrogen content increased after an initial period of decrease. The improvement in nitrogen content in the upper part of slope was stronger than that in the middle and lower parts of slope. Alkali-hydrolysis nitrogen content was significantly related to total nitrogen content. The differences among different construction years were more significant in the upper and lower parts of slope. (3) In the first three construction years, differences were noted in the distribution patterns of total phosphorus on different slope positions. In the fourth year of development, however, the distribution pattern of total phosphorus along slope were in the reverse order to the control. The distribution pattern of total phosphorus along slope followed the order of lower part > middle part > upper part, with significant (P=0.000) difference among different slope positions. Furthermore, soil available phosphorus exhibited some degree of volatility with construction years of net terrace biological bank. Although the coefficient of variation was reached 31.37%, the average content of available phosphorus increased to 1.15 3.30 times compared with the control, where no obvious distribution patterns were noted on the slopes. (4) Compared with the control, total potassium content increased by 9.7% 28.2%. With increasing construction years of net terrace biological bank, however, total potassium decreased. Net terrace biological bank also improved soil available potassium content. The differences in available potassium content in different slope positions were enhanced after an initial year of construction of net terrace biological bank.

     

/

返回文章
返回