摘要 : Chinese white poplar (Populus tomentosa Carr.) is an indigenous tree species in China which plays a key role in the establishment of plantation forests and the conversion of cropland to forestland. By using response surface method... 展开 Chinese white poplar (Populus tomentosa Carr.) is an indigenous tree species in China which plays a key role in the establishment of plantation forests and the conversion of cropland to forestland. By using response surface methodology based on rotatable central composite design, we conducted a test with clone 87 of P. tomentosa seedlings to quantify the interactions among soil water content (W), nitrogen application (N), and phosphorus application (P) on plant stem height (SH), leaf area (LA), net photosynthetic rate (P _N) and biomass yield (BY). Our results showed that W, N and P had obvious positive effects on plant SH, LA, P _N and BY, and the magnitude of effects in decreasing order was Wa??>a??Na??>a??P. There were synergistic effects of Wa????a??N on SH, LA and BY, whose values first increased and then decreased with N increasing under a fixed level of W and also with W increasing under a fixed N. A similar trend was found with the interaction of Wa????a??P significantly effecting LA. A multiple target decision model synthesizing all four parameters was established to obtain the optimized combination. We concluded that the recommended combination of W, N and P for growers was Wa??=a??78.1% of the field capacity, Na??=a??4.48a??ga??plant^a??1, and Pa??=a??1.67a??ga??plant^a??1. These recommendations should help to achieve maximum growth potential of P. tomentosa seedlings, obtain high water and fertilizer use efficiencies and reduce the risk of nitrate pollution of groundwater in arid and semi-arid regions.View full textDownload full textKeywordsbiomass yield, Chinese white poplar (Populus tomentosa Carr.), rotatable central composite design, nitrogen and phosphorus application, soil water.Related var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/00380768.2010.549445 收起