| The relationship between dynamic change in nutrient contents and biomass and yield of tomato under coupled irrigation and fertilization in greenhouse |
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| DOI：10.7606/j.issn.1000-7601.2019.05.22 |
| Key Words: greenhouse tomato irrigation and fertilization coupling dynamic changes of nutrient content dry matter yield partial factor productivity of fertilizer |
| Author Name | Affiliation | | WANG Hu-bing | College of Water Conservancy and Architectural Engineering, Northwest A&F University, Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Yangling, Shaanxi 712100, China | | CAO Hong-xia | College of Water Conservancy and Architectural Engineering, Northwest A&F University, Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Yangling, Shaanxi 712100, China | | HAO Shu-xue | College of Water Conservancy and Architectural Engineering, Northwest A&F University, Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Yangling, Shaanxi 712100, China | | PAN Xiao-yan | College of Water Conservancy and Architectural Engineering, Northwest A&F University, Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Yangling, Shaanxi 712100, China |
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| Abstract: |
| This paper combined drip irrigation technology under mulch in order to explore the changes in nutrient dynamics of tomato plant and its influence on biomass and yield under different water and fertilizer regulation, which aimed to provide theoretical basis for optimum local water and fertilizer management. Through field experiments, the irrigation amount was established based on accumulative evaporation (E) of two irrigation intervals for a standard pan (20 cm). Water volumes were set as 1.0E (W1), 0.75E (W2) and 0.5E (W3) and fertilizer treatments of N-P2O5-K2O(F) were set as F1: 320-160-320 kg·hm-2, F2: 240-120-240 kg·hm-2, F3: 160-80-160 kg·hm-2. Nine treatments were included. The results showed that tomato yield and dry matter were significan tly affected by the irrigation and fertilization and positively correlated with increasing irrigation water and fertilizer.The high water treatment (W1) increased fruit yield and dry matter by 16.5% compared to low water treatment (W3). F1 increased yield and dry matter by 8% and 9.6%, respectively, over F3 treatment. The nitrogen (N) content of plant ranged between 1.81% and 3.47% and decreased with increasing the growth period, phosphorus (P) content showed "serration" volatility between 0.48% to 0.78%, and potassium (K) content increased first and then decreased ranging between 2.80% and 4.79% with growth period. Irrigation and fertilizer had a significant influence on N, P (51、63 d after transplanting) and K. The N and K contents increased with increasing irrigation and fertilization. In W1 treatment, N and K content increased by 7.4%~20.0% and 5.6%~25.7%, respectively, over W3 treatments. Comparing with F3, F1 increased N and K content by 3.3%~20.8% and 3.3%~26.4%, respectively. There was a significant negative correlation between dry matter and plant N and K, and a significant positive correlation between yield and plant N and K in growth stage. When irrigation amount was high, the NUE was smaller, but the UPE and the PFP of plant nutrients were higher. The high fertilizer amount resulted in small NUE. |
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