• ISSN 1008-505X
  • CN 11-3996/S
YUE Wen-jun, CHEN Xi-jing, WANG Wei-han, ZHANG Fu-cang. Effects of different nitrogen treatments on yield and quality of greenhouse muskmelon under mulched drip irrigation condition[J]. Journal of Plant Nutrition and Fertilizers, 2019, 25(3): 461-469. DOI: 10.11674/zwyf.18149
Citation: YUE Wen-jun, CHEN Xi-jing, WANG Wei-han, ZHANG Fu-cang. Effects of different nitrogen treatments on yield and quality of greenhouse muskmelon under mulched drip irrigation condition[J]. Journal of Plant Nutrition and Fertilizers, 2019, 25(3): 461-469. DOI: 10.11674/zwyf.18149

Effects of different nitrogen treatments on yield and quality of greenhouse muskmelon under mulched drip irrigation condition

  • Objectives The conventional soil fertilization is relatively low in fertilizer efficiency in crop production inside the facilities in China. The alternative drip irrigation-fertilization technology was applied in muskmelon planting, and the suitable nitrogen application amount and frequency were studied in this paper.
    Methods Muskmelons cultivar of YPTX208 was used as test materials in a mulched drip irrigation experiment inside greenhouse. The irrigation amount was determined using modified Penman-Monteith equation and 1.0ETc was adopted for irrigation. Three N levels of 85, 125 and 160 kg/hm2 (N1, N2 and N3) and three N application frequencies of 5, 10 and 15 days (F5, F10 and F15) were setup for the experiment. Leaf net photosynthetic rate was measured during the fruit enlargement period. The dry matter accumulation, nutrient absorption, fruit yield and quality of muskmelon were measured during the ripening period.
    Results At the same N level, the leaf net photosynthetic rate was the highest in frequency of F5, followed was F10 and F15, the average increase was 17.4% and 56.1%. At the same N application frequency, the leaf net photosynthetic rate in N3 was higher than in N1 and N2, the average increase was 22.6% and 9.8%. Under N1 and N2 rates, the higher N application frequency significantly promoted dry mass accumulation and NPK uptake of muskmelon; while under N3 rate, there was statistically significant difference in growth and NPK accumulation between F5 and F10. Under the same N application frequency, the yield of treatment N3 was 25.30 t/hm2, which was significantly higher than that in treatment N1 (P < 0.05), but not than N2, the average increase was 7.2% and 0.4%. At the same N application frequency, N2 has the best pulp quality, insufficient or excessive N application was not conducive to the improvement of melon quality. At the same N level, the pulp quality of treatment F10 was higher than that of treatment F5 and F15.
    Conclusions Nitrogen level of 125 kg/hm2 and the nitrogen application frequency of 10 day are recommended as the better combination, although its yield is slightly lower than that in nitrogen level of 160 kg/hm2 and the application frequency of 5 day.
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