Shan Q.,Chinese Academy of Forestry |
Zhang J.,Chinese Academy of Forestry |
Ruan W.,Agriculture and Rural Office of Simen Town |
Tang H.,Agriculture and Rural Office of Simen Town |
And 2 more authors.
Shengtai Xuebao/ Acta Ecologica Sinica | Year: 2011
To probe the irritability of soil quality indicators on comprehensive amelioration measures applied in coastal salt- affected land of Hangzhou bay, the soil profiles in the ameliorated zone were investigated by comparisons with controls, those in the same zone before amelioration activity as temporal controls and in the wasteland and farmland nearby as procedure controls, revealing the response of soil quality indicators to comprehensive amelioration measures through three aspects as sensitivity, process and responsivity. The results showed that soil salt content, organic matter and total nitrogen (TN) were susceptible to the comprehensive amelioration measures and had a regularly changing tendency. Soil total phosphorus(TP) and available phosphorus were also sensitive to comprehensive amelioration measures but the tendency was not steady. Soil dehydrogenase activity was somewhat responsive to comprehensive amelioration measures. But soil pH, total potassium(TK), available potassium and catalase activity had no obvious responses to comprehensive amelioration measures in the period of 2 years. It was concluded that the comprehensive amelioration measures had already affected positively the quality of soil in coastal salt-affected land only after afforestation in 2 years. Salt content, organic matter and total nitrogen of soil in coastal saline land were approved to be modified easily through ecological measures, but soil pH in the same area was hard to be ameliorated. In addition, it must be pointed out that the effect of eco-control ways on the other soil indicators still needed to further probe.
Shan Q.-h.,Chinese Academy of Forestry |
Zhang J.-f.,Chinese Academy of Forestry |
Shen L.-m.,Yuyao Forestry Technology Extension Station |
Tang H.-j.,Agriculture and Rural Office of Simen Town |
And 2 more authors.
Chinese Journal of Ecology | Year: 2012
Forestry ecological engineering, an important measure for the ecological amelioration of our coastal saline-alkaline land, has definite effects on the local natural ecosystem. This paper studied the effects of forestry ecological engineering on the herb community in a saline-alkali land at the Yuyao section of Hangzhou Bay. On the land, a shelterbelt of 3.5 km in length and 30 m in width and between two originally existed lands, namely, farmland and wasteland, was constructed with comprehensive ecological engineering measures. The herb community structure and diversity in the farmland, forestland, and wasteland were investigated by visual and sampling plot methods, with the species, species-area relationship, frequency, biomass, summed dominance ratio (SDR), richness, Pielou evenness index, Shannon index, and Simpson index as the indicators. In the whole study area, a total of 31 herbaceous plant species belonging to 30 genera and 14 families were recorded. Poaceae and Asteraceae dominated everywhere. Compared to the farmland and wasteland, the herb community in the shelterbelt exhibited obviously different ecological traits, including varied species, enlarged minimum area, more complex structure, and increasing species diversity. The habitat filter functioned efficiently in the ameliorated zone, while the competitive exclusion did not temporarily. It was concluded that forestry ecological engineering disturbed the primary structure and diversity of the plant species in the coastal saline-alkali land, leading to a new plant succession in the restoration zone, and implying a great ecological efficiency.