Interactions between soil water content and fertilizer on growth characteristics and biomass yield of Chinese white poplar (Populus tomentosa Carr.) seedlings(Soil Fertility)

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概要

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• 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 W>N>P. There were synergistic effects of W×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 W×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 W=78.1% of the field capacity, N=4.48g plant^<-1>, and P=1.67g plant^<-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 semiarid regions.

著者

• Zhao Yan

  College Of Forestry Henan University Of Science And Technology

• DONG Wenyi

  National Engineering Laboratory for Tree Breeding, Key Laboratory for Genetics and Breeding in Fores

• QIN Jing

  College of Soil and Water Conservation, Beijing Forestry University

• LI Jiyue

  National Engineering Laboratory for Tree Breeding, Key Laboratory for Genetics and Breeding in Fores

• NIE Lishui

  College of Soil and Water Conservation, Beijing Forestry University

• ZHANG Zhiyi

  College of Biological Sciences and Biotechnology, Beijing Forestry University

• Li Jiyue

  National Engineering Laboratory For Tree Breeding Key Laboratory For Genetics And Breeding In Forest

• Nie Lishui

  College Of Soil And Water Conservation Beijing Forestry University

• Dong Wenyi

  National Engineering Laboratory For Tree Breeding Key Laboratory For Genetics And Breeding In Forest

• Zhang Zhiyi

  College Of Biological Sciences And Biotechnology Beijing Forestry University

• Qin Jing

  College Of Soil And Water Conservation Beijing Forestry University

関連論文

• Interactions between soil water content and fertilizer on growth characteristics and biomass yield of Chinese white poplar (Populus tomentosa Carr.) seedlings(Soil Fertility)

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