| Effects of irrigation and fertilization on growth, water and nitrogen use of tomato in greenhouse under fertigation |
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| DOI：10.7606/j.issn.1000-7601.2017.04.16 |
| Key Words: tomato yield irrigation fertilization water use efficiency nitrate residue partial productivity of nitrogen fertilizer |
| Author Name | Affiliation | | ZHANG Yan | College of Urban and Rural Construction, Shanxi Agricultural University, Taigu, Shanxi 030801, China
Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Area Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, China | | ZHANG Fu-cang | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Area Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, China | | QIANG Sheng-cai | College of Urban and Rural Construction, Shanxi Agricultural University, Taigu, Shanxi 030801, China
Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Area Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, China | | LI Zhi-jun | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Area Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| With the tomato variety “Huiyu 0806” as test material, a greenhouse fertigation experiment was conducted to study the effects of irrigation and fertilization on tomato growth, yield, water-nitrogen use efficiency. The experiment was designed with three irrigation water amount levels by 100% ET0 (I1), 75% ET0 (I2) and 50% ET0 (I3), with three fertilizer levels by F1(N 480 kg·hm-2, P2O5 240 kg·hm-2, K2O 300 kg·hm-2), F2(N 360 kg·hm-2, P2O5 180 kg·hm-2, K2O 225 kg·hm-2) and F3(N 240 kg·hm-2, P2O5 120 kg·hm-2, K2O 150 kg·hm-2), and there were 9 treatments in total. Results showed that growth of stem diameter, yield, dry matter accumulation, water use efficiency and irrigation water use efficiency were the highest under I2 and F2 treatment combination, with values were 10.3 mm, 102 042.3 kg·hm-2, 37 192.3 kg·hm-2, 352.8 kg·mm-1·hm-2 and 372.6 kg·mm-1, respectively, with higher nitrogen fertilizer partial factor productivity of 133.4 kg·kg-1 while lower nitrate residue of 105.3 mg·kg-1 within the 0～50 cm soil layer at harvest. Low irrigation supply treatment (I3) reduced the yield, while sharply increased the nitrate nitrogen content in soil. Compared with I2 treatment, treatment of I1 decreased the water use efficiency，but no significant differences were observed between I1 and I2. Overall, we recommend I2F2 treatment for obtaining high crop yield water use efficiency, and low nitrate residue in soil. |
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