c 8368是赤峰市农牧科学研究院以自育的胞质雄性不育系052 A为母本,胞质雄性不育恢复系089 R为父本配制的食用向日葵杂交种。通过2009年品比试验,2010年内蒙古自治区预备试验,2011年内蒙古自治区区域试验,2012年内蒙古自治区生产试验,...
详细信息
c 8368是赤峰市农牧科学研究院以自育的胞质雄性不育系052 A为母本,胞质雄性不育恢复系089 R为父本配制的食用向日葵杂交种。通过2009年品比试验,2010年内蒙古自治区预备试验,2011年内蒙古自治区区域试验,2012年内蒙古自治区生产试验,该品种表现产量高、抗病性强、商品性好、适应性广等特点。2013年通过内蒙古自治区农作物品种审定。
changes in atmospheric temperature and lowering in water-table (WT) are expected to affect peatland nutrient dynamics. To understand the response of peatland nitrogen (N) and phosphorus (P) dynamics to warming and dra...
详细信息
changes in atmospheric temperature and lowering in water-table (WT) are expected to affect peatland nutrient dynamics. To understand the response of peatland nitrogen (N) and phosphorus (P) dynamics to warming and drainage in a continental wooded-bog of hummock-hollow microtopography, we compared three sites: (a) control, (b) recently drained (2-3years;experimental), and (c) older drained (12-13years;drained), during 2013. The WT was lowered at experimental and drained sites to 74 and 120cm, respectively, whereas a warming of similar to 1 degrees c was created at one half of the microforms using open-top chambers. Responses of peat total inorganic nitrogen (TIN=nitrate nitrogen [NO3--N]+ammonium nitrogen [NH4+-N]) and phosphate-P (PO43--P) pools and vegetation c:N ratio, c-13 and N-15 to the experimental treatments were investigated across sites/microforms and over time. Peat TIN available and extractable pools increased with deepening of WT and over time and were greater at hummocks relative to hollows. In contrast, the PO4 pools increased with short-term drainage but reverted to very close to their original (control) nutrient values in the longer term. The WT and warming driven change in the peat TIN pool was strongly reflected in the vascular vegetation c:N ratio and shrub c-13 and N-15, whereas moss nutrient dynamics did not vary between sites. Therefore, we suggest that atmospheric warming combined with WT deepening can increase availability of mineral N and P, which then can be reflected in vascular vegetation and hence modify the productivity and ecosystem functioning of the northern midlatitude continental wooded bogs in the long term.
暂无评论