JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2016, Vol. 40 ›› Issue (03): 33-40.doi: 10.3969/j.issn.1000-2006.2016.03.006

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Effects of water and fertilizer coupling on growth, nutrients absorption and fertilizer use of Zanthoxylum bungeanum Maxim ‘Hanyuan' seedling

WANG Jingyan1, TANG Hailong1, GONG Wei1*, HU Wen2, GOU Guojun3   

  1. 1.Sichuan Provincial Key Laboratory of Ecological Forestry Engineering, Sichuan Agricultural University, Ya'an 625014, China;
    2. Hanyuan Conty Forestry Bureau, Ya'an 625300, China;
    3. Hanyuan Conty Science and Technology Bureau, Ya'an 625300, China
  • Online:2016-06-18 Published:2016-06-18

Abstract: Water and fertilizer are two key factors for promoting plant growth, thus, studying their coupling effects on growth of Zanthoxylum bungeanum Maxim ‘Hanyuan' has important practical significance for carrying out reasonable water and fertilizer management. A pot experiment with a two factors and three levels orthogonal design was conducted to study the effects of water and fertilizer coupling on growth, nutrient absorption and fertilizer use of Z. bungeanum Maxim ‘Hanyuan' seedlings, and the subordinate function was applied to comprehensively evaluate the impact of water and fertilizer on growth of Z. bungeanum Maxim ‘Hanyuan' seedlings. Seedling base diameter, height and biomass, and nitrogen(N), phosphate(P)and potassium(K)absorption increased with the raising of the fertilization level, and increased initially and then decreased with the increasing of the soil water content before and after their peak, respectively. N, P and K fertilizer use efficiency decreased with the raising of the fertilization level, and increased initially and then decreased with the increasing of the soil water content before and after their peak, respectively. Root/shoot ratio decreased with the increasing of the soil water content and fertilization level. The relationship among growth subordinate degree of Z. bungeanum Maxim ‘Hanyuan'(y2), soil water content(x1)and fertilization level(x2)as follows: y2 = -2.070 0- 0.001 3x21-0.206 0x22 + 0.118 1x1 + 0.512 6x2(n=27, R2=0.962). The optimal combination of water and fertilizer was 46.1% field water capacity, 187 kg/hm2 N of urea, 75 kg/hm2 P2O5 of calcium superphosphate, and 187 kg/hm2 K2O of potassium sulfate. The seedling biomass of Z. bungeanum Maxim ‘Hanyuan' significantly and positively correlated with fertilizer use efficiency of N, P and K(P<0.05). Appropriate soil water content and fertilizer application are important for promoting seedling growth and nutrient absorption and utilization of Z. bungeanum Maxim ‘Hanyuan', and alleviating or preventing environmental pollution caused by excessive fertilizer application.

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