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| Effects of nitrogen content on growth and hydraulic characteristics of peach （Prunus persica L.） seedlings under different soil moisture condi- tions | |
| 引用本文： | Zhi-liang Zhang,Guo-dong Liu,Fu-cang Zhang,Cai-xia Zheng,Fu-quan Ni,Yin-hong Kang,Yun Zeng. Effects of nitrogen content on growth and hydraulic characteristics of peach （Prunus persica L.） seedlings under different soil moisture condi- tions[J]. 林业研究, 2014, 25(2): 365-375. DOI: 10.1007/s11676-014-0464-z |
| 作者姓名： | Zhi-liang Zhang Guo-dong Liu Fu-cang Zhang Cai-xia Zheng Fu-quan Ni Yin-hong Kang Yun Zeng |
| 作者单位： | [1]College of Water Resource and Hydropower, Sichuan University,Chengdu 610065, P. R. China; College of Information and Technology,Sichuan Agricultural University, Ya＇an, Sichuan 625014, P. R. China. [2]College of Water Resource and Hydropower, Sichuan University,Chengdu 610065, P. R. China. [3]Key Laboratory of Agricultural Soil and Water Engineering in Arid andSemiarid Areas of Ministry of Education, Northwest Sci-TechUniversity of Agriculture and Forestry, Yangling, Shaanxi 712100, P. R.China. [4]College of Information and Technology, Sichuan Agricultural University, Ya＇an, Sichuan 625014, P. R. China. |
| 摘 要： | A pot experiment was conducted to investigate the effects of nitrogen content [N1(no fertilizer), N2(0.15 g?kg–1), and N3(0.3 g?kg–1)] on the growth and the hydraulic characteristics of peach seedlings under different soil moisture conditions(W1, W2 and W3, in which the soil water content was 45% to 55%, 60% to 70%, and 75% to 80% of the field water capacity, respectively) by using a specialized high pressure flow meter with a root chamber and a coupling, which was connected to plant organs. Leaf area and leaf hydraulic conductivity(KL) increased significantly in the seedlings because of increased soil moisture and N content. KL increased with leaf area. A linear correlation was documented between KL and leaf area. KL was higher in the morning and began to decline sharply after 16:00, at which KL declined after an initial increase. Soil moisture and N content enhanced shoot(Ks) and root(Kr) hydraulic conductivities, thereby improving the low soil moisture condition to a large extent. Ks and Kr of the seedlings were reduced by 32% and 27% respectively in N1, and by 14.7% and 9.4%, respectively in N2, and both in W1, compared with the control treatment. N3 had no significant effect on Ks and Kr under similar conditions. Linear negative correlations were observed between Kr and the excised root diameter as well as between Ks and the shoot stem diameter. The shoot-to-root ratio increased with increase in N content. The shoot-to-root ratio in N3 was increased by 14.37%, compared with N1 in W1 as well as by 12% and 4.39% in W2 and W3, respectively. Knowledge of the effects of soil moisture and N fertilizer on hydraulic characteristics and growth is important. Our results provide basic guidelines for the implementation of water-saving irrigation and fertilization management of nursery stock. |
| 关 键 词： | 土壤水分条件 水力特性 氮含量 生长 齿根圆直径 桃 水力传导系数 土壤水分状况 |
Effects of nitrogen content on growth and hydraulic characteristics of peach (Prunus persica L.) seedlings under different soil moisture conditions |
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| Zhi-liang Zhang,Guo-dong Liu,Fu-cang Zhang,Cai-xia Zheng,Fu-quan Ni,Yin-hong Kang,Yun Zeng. Effects of nitrogen content on growth and hydraulic characteristics of peach (Prunus persica L.) seedlings under different soil moisture conditions[J]. Journal of Forestry Research, 2014, 25(2): 365-375. DOI: 10.1007/s11676-014-0464-z | |
| Authors: | Zhi-liang Zhang Guo-dong Liu Fu-cang Zhang Cai-xia Zheng Fu-quan Ni Yin-hong Kang Yun Zeng |
| Affiliation: | 1. College of Water Resource and Hydropower, Sichuan University, Chengdu, 610065, P. R. China 2. College of Information and Technology, Sichuan Agricultural University, Ya’an, Sichuan, 625014, P. R. China 3. Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest Sci-Tech University of Agriculture and Forestry, Yangling, Shaanxi, 712100, P. R. China |
| Abstract: | nitrogen, Hydraulic conductivity, growth, WUE, Prunus persica L. |
| Keywords: | nitrogen Hydraulic conductivity growth WUE Prunus persica L. |
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