Search

Wetland ecology monitoring is an essential technical guarantee for the protection and restoration of the fragile ecosystem of wetlands. Due to the degradation of keystone species Suaeda HeteropteraPall. (S. Heteroptera) in the Liao River Estuary wetland, the Wetland Image Monitoring System (WIMS) was established to obtain real-time, continuous, high spatiotemporal resolution data about the coverage and height of S. Heteroptera. Based on the monitoring data, we elicited the best model to describe the variation of the coverage and height for S. Heteroptera. The results showed that the growth of S. Heteroptera could be divided into three stages: rapid growth stage (April–May), slow growth stage (June–August), and stable stage (after September). The Bertalanffy model was the best choice for the coverage simulation of S. Heteroptera. The segment model composed of the linear and Gompertz models was suitable for the height simulation of S. Heteroptera, which could effectively reduce the relative error compared with the single model. In addition, the WIMS could potentially capture other important ecological factors in local regions, including benthic animals, birds, waterlogging conditions, etc. Although WIMS has some application limitations, the high spatiotemporal resolution and relatively low cost make it an effective tool to explore the degradation of typical ecosystems under climate change and human activities. [ABSTRACT FROM AUTHOR]

Peanut (Arachis hypogaea L.) is one of the most important crops produced worldwide. Peanut is the dominant crop in the typical upland red soil areas of China; however, phosphorus bioavailability in red soil is very low, which severely affects peanut production. To improve the phosphorus bioavailability, which substantially promotes the green development of peanut production, a peanut–green manure rotation field experiment was conducted with six treatments (milkvetch; radish; brassica rape; mustard rape; winter fallow and no-tillage), commencing in September 2017 in the red soil area of Jiangxi province, China. The results show that compared with no-tillage (NT) treatments, different green manure returning treatments had significant effects on soil pH, soil phosphorus components and available potassium content. The particulate phosphorus and soil available phosphorus contents in the green manure treatments were significantly higher than those in the winter fallow (WF) treatment. Compared with the WF treatment, the content of particulate phosphorous in brassica rape (BR), radish (R) and milkvetch (MV) treatments was significantly increased by 6.55%, 3.66% and 2.50%, respectively; the available phosphorus content in mustard rape (MR), BR, R and MV was significantly increased by 20.93%, 25.60%, 23.76% and 18.10%, respectively. In addition, the total phosphorus content of peanut shell in the MV and R treatment was significantly higher than that in the WF treatment, increasing by 33.47% and 60.66%, respectively. Compared with the WF treatment, the peanut biomass of MR, BR and R treatments increased significantly by 19.51%, 29.83% and 19.77%, respectively. The total phosphorus accumulation in all green manure treatments was higher than that in the WF treatment, and the MV treatment reached a significant level at 18.83%. Based on these results, the particulate phosphorus (PP) and available phosphorus were significantly affected by different green manure treatments; green manure amendment improves peanut phosphorus uptake. The use of green manure (especially milkvetch and brassica rape) can be recommended to improve phosphorus bioavailability and yield of peanut in red soil areas. [ABSTRACT FROM AUTHOR]

In China, the types of immovable property objects cover not only land (a typical immovable property object) but also buildings, sea areas, forests, etc., and the general idea of unified registration of immovables (as the newest development and hottest topic in field of land administration in China) proposed by Property Law of the People’s Republic of China (2007) is not detailed until 2014 when “ Interim Regulations on Real Estate Registration ” was enacted and would come into force in 2015. This paper focuses on modeling of unified registration of immovables in China whose cores rely on “4 unifications” (i.e., unification of registering basis, unification of registering authorities, unification of information management platform, unification of registering books) using the world-wide advanced standard LADM (Land Administration Domain Model). In detail, the typical 8 immovable property rights ( right to use construction land/forest land/sea area, ownership of houses/forests/marine structures, right to contractual management of arable land/grass land ) are firstly introduced; then change of register types before and after unified registration (as one important component of “unification of registering basis”) is described; later, comparison of register procedures reflecting “unification of authorities”, “unification of information management platform” and “unification of registering books” is modeled using LADM where parties, 3R, spatial units package are greatly referenced which is followed by elaboration of a newly proposed URDMIPO (Unified Registration Data Model for Immovable Property Object). However, the complete implementation of unified registration in China will still take a long time. [ABSTRACT FROM AUTHOR]