| Effects of water and nitrogen supply on growth and water use of tomato under controlled root divided alternative irrigation |
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| DOI：10.7606/j.issn.1000-7601.2013.01.14 |
| Key Words: controlled root-divided alternative irrigation (CRDI) water and nitrogen supply tomato growth characters yield water use |
| Author Name | Affiliation | | ZHANG Yan | Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming 650500, China | | LIU Xiaogang | Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming 650500, China | | ZHANG Fucang | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, China | | LI Zhijun | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, China | | GE Zhenyang | Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming 650500, China | | YANG Qiliang | Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming 650500, China |
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| Abstract: |
| In order to find out the influence of different water and nitrogen supply to growth characteristics of crops under the controlled
root-divided alternative irrigation (CRDI), a pot experiment was conducted to a
nalyze the growth, yield and water use efficiency of tomato under the treatments
of CRDI as well as water and nitrogen supply. The results indicated that, under
CRDI, the plant height of low nitrogen treatment was high, the stem diameter of
high water and low nitrogen treatment or low water and middle nitrogen treatmen
t was high, and the dry mass accumulation of medium nitrogen treatment was 1.25
and 1.01 times that of high nitrogen treatment and low nitrogen treatment, respe
ctively. The mean water use efficiency of high water treatment with CRDI was 1.0
5 and 1.12 times that of low water treatment with CRDI and high water treatment
with conventional irrigation respectively. CRDI could increase root-shoot ratio
by 7.89%～31.61%. The mean yield of high water treatment with conventional irri
gation was the highest, which was 1.05 and 1.39 times that of high water tre
atme
nt with CRDI and low water treatment with CRDI respectively. Under CRDI, the wat
er consumption of medium nitrogen treatment was 1.04 and 1.16 times that of low
nitrogen treatment and high nitrogen treatment respectively. |
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