On Songnen grassland, we detendbed the above-gmund biomass of oneyear growth, two-year growth, three-year growth, six-year growth and wild growth population P. tenuiflora, and we have done the mathematical simulation with them.
Total flavonoids content in spring, autumn harvested and wild Juema-the root tuber of Potentilla anserina L. were measured using method, result showed that total flavonoids content in cultivated species is the same as the wild growth species,but it is 25.8% higher in autumn-Juema than that in spring-Juema, which providedthe theoretical guide for the best harvesting time of Juema.
Mobile ad-hoc networks (MANETs) provide highly robust and self-configuring network capacity required in many critical applications, such as battlefields, disaster relief, and wild life tracking.
The threshold wind velocity of a number of variables was studied in four different land-use types: farm land, forestland, wild grassland and a flood plain in the Yongding River sandy land in Beijing.
The following conclusions were drawn: 1) The order of decreasing threshold of wind speed for sand displacement and surface roughness were forestland, wild grassland, farm land, sparse wild grassland and flood plain.
3) The mechanical composition of sand particles consisted mainly of silver sand in the flood plain and sparse wild grassland, and of silver sand, particle silver sand and floury sand in other land-use types.
Comparison experiments of the mutant PEL-E83V-GS and the wild-type PEL-GS showed that the optimum temperature (45°C) of the mutant was 5°C higher than that of the wild type.