In view of the conditions of the natural food resources and fishes construction in Qingping Lake,by means of the stocking and natural proliferation of fishes,adjusting constantly the correlation between stocking fishes and natural fishes so as to fully utilize natural food resources,and with supplementary application of fertilizers and food throwing,the yield of fishing was increased from 19.3kg/667m 2 in 1989 up to 86.1kg/667m 2 in 1992.
Under the same conditions of area,stocking density and rearing method,survival rate from fry to seedling was 5.1% ,which the fry was produced in natural seawater pond,and 8064 seedlings per mu were obtained.
In summer pasture,with the increase of stocking rate,contents of AN for different stratums decreased with depth. When stocking rate was 1.07,1.08 and 1.22 heads·hm~(-2) respectively,contents of AN for 0～5 cm,5～10 cm and 10～20 cm in sequence reached the minimum value.
In addition,in summer pasture,average contents of AN for 0～20 cm soil stratum reached the minimum value when stocking rate was 1.07 heads·hm~(-2),while contents of TP,AP and AN were the maximum at 0.90,0.83 and 1.21 heads·hm~(-2) respectively in winter pasture.
The net primary production were increased by stocking rate. They were 1210. 9, 1076. 4, 987. 9 and 555. 2 g/m under stocking rates 69%, 55%, 45% and no grazing. As the same, the perennial ryegrass were 899. 8, 777. 0, 746. 0 and 372.0 g/m2;
This paper uses the stocking degree Rv as a correctional coefficient to reflect the influence of the nutritive spatial structure within a stand on the stocking in order to raise the applied accuracy of the stand density management diagram.
In the critical moment of 8, 16 and 32, the ratio of stocking percent to volume percent was tending towards 1 0, these were 3 periodicities of evolution of Pinus kesiya var. langbianensis stand, and were corresponding with periodic transfer probability array.
The change of stand average diameter was related with the “inside time(T=D)”, the relationship between the array “stocking percent/volume percent” depicted by “inside time(T=D)” and the array “tree number lapse rate/volume increase rate” depicted by “inside time(T=D)” represented the evolution of stand structure.
Depending on the integrated stand growth models of Cunninghamia lanceolata in Huitong, this paper established the natural growth models of the full stocking stand and the common stands of Cuuninghamia lanceolata in Huitong. It also established the artificially controlled density growth models of artificial Cuuninghamia lanceolata stand, using the artificial neutral networks.
Influence of Stocking Rate on the Level of Stress Hormones and the Survival of the Progeny in Coho Salmon, Oncorhynchus kisutch
In a tropical wet montane evergreen forest in the southern peninsular India, the estimated stocking of dead wood is 90 ± 3 stems·ha-1 and the total dead wood volume is 70.7 m3·ha-1.
When the logs (downed dead trees more than 10.1 cm in diameter) constitute about 80% of the total deadwood stocking and volume, the rest is by snags (sound and rotting standing dead trees).
In addition there was a slight sensory disturbance of glove and stocking type distribution.
More material indices generating significant gradual changes occurred in the fabric wale direction along stocking hose, meaning that materials properties in wale direction would exert more important impact on the skin pressure gradient performances.