| Effects of fertilization on the yield of tomato and soil nutrient contents in newly-built sunlight greenhouse |
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| DOI：10.7606/j.issn.1000-7601.2012.01.04 |
| Key Words: newly-built greenhouse fertilizer treatment tomato yield soil nutrient |
| Author Name | Affiliation | | GAO Jiajia | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | LEI Jinfan | Yangling Agricultural Technology Service Station, Yangling, Shaanxi 712100, China | | CHEN Zhujun | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | ZHOU Jianbin | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| A research was carried out to study the effects of different fertilization treatments on the yields of tomato and soil physical and chemical properties in newly-built greenhouse over a season of tomato crop. Three field experiments were conducted in three differently newly-built greenhouse in Yangling, Shaanxi Province to evaluate the effects of different fertilizer treatments (CF, FF1 and FF2) on the yield of tomato and the contents of soil organic matter, total nitrogen, mineral nitrogen, available phosphorus, available
potassium and electrical conductivity before planting and after harvesting. The results indicated that in comparison with the conventional fertilization treatment, the yields of tomato of formula fertilization treatments did not decrease significantly when the rates of N, P, and K fertilizer applied were decreased by 9%～40%, 26%～46% and 18%～47%, respectively, indicating the over-application of chemical fertilizer for conventional fertilization treatment. Compared to the results before planting, the contents of organic matter, total nitrogen, available phosphorus and available potassium in soil increased after one growing season; and significant increase was observed for organic matter and available phosphorus (by 25% and 460%, respectively). The electrical conductivity in the 0～100 cm soil layer also increased to some degree. The mineral nitrogen content in the 0～100 cm soil layer significantly increased by 182% on average. Nitrate-N accumulation in the 0～200 cm soil layer reached up to 727 kg/hm2 on average. It is concluded that the over-application of chemical fertilizer in newly-built greenhouse and the accumulation of nitrate and available phosphorus its in soil deserve more attentions. |
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