| Influence of the combination application of organic manure and nitrogen fertilizer to watermelon growth, yield and quality under mulched drip\|irrigation condition |
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| DOI：10.7606/j.issn.1000-7601.2021.01.18 |
| Key Words: mulched drip irrigation organic manure watermelon yield quality growth |
| Author Name | Affiliation | | LUO Shuanglong | Institute of Soil, Fertilizer and Water\|Saving Agriculture, Gansu Academy of Agricultural Science, Lanzhou, Gansu 73007, China | | MA Zhongming | Institute of Soil, Fertilizer and Water\|Saving Agriculture, Gansu Academy of Agricultural Science, Lanzhou, Gansu 73007, China
Gansu Academy of Agricultural Science, Lanzhou, Gansu 730070, China | | XUE Liang | Gansu Academy of Agricultural Science, Lanzhou, Gansu 730070, China | | LIAN Caiyun | Gansu Academy of Agricultural Science, Lanzhou, Gansu 730070, China | | TANG Wenxue | Gansu Academy of Agricultural Science, Lanzhou, Gansu 730070, China | | WANG Zhiqi | Gansu Academy of Agricultural Science, Lanzhou, Gansu 730070, China | | DU Shaoping | Institute of vegetables, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China |
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| Abstract: |
| A field experiment was conducted in arid northwestern China to define the most suitable combination of organic fertilizer and chemical nitrogen fertilizer to produce the highest yield with the best fruit quality of watermelon. There were 6 fertilizer treatments including: CK, no N fertilizer and organic fertilizer; M, organic fertilizer without N fertilizer; N1PKM, organic fertilizer with 30% N fertilizer; N2PKM, organic fertilizer with 50% N fertilizer; N3PKM, organic fertilizer with 70% N fertilizer; and NPK, N fertilizer without organic fertilizer. A comparative experimental design was used. Theresults showed that N1PKM treatment significantly improved growth, quality, yield, and nutrient absorption of watermelon. Compared to CK, at elongation stage, N1PKM treatment increased chlorophyll content, main vine length, stem diameter, and dry matter accumulation of watermelon by 6.15%, 13%, 21.7%, and 52%, respectively. At the flower and fruit stages, N3PKM treatment increased chlorophyll content, main vine length, stem diameter and dry matter accumulation, yield, sugar content, Vc content, nitrate content, N use efficiency, and N accumulation of watermelon by 3.38%, 2, 7.3%, 10.1%, 5.51%, 2.7%, 16.86%, 10.42%, 66.56%, and 18.54%, respectively. These results demonstrated that under the same organic fertilizer input level (9 000 kg·hm-2), organic fertilizer with 30% N fertilizer (175 kg·hm-2) could be a suitable substitution rate for producing the highest fruit quality and yield of watermelon under mulched drip\|irrigation, which could be recommended as a fertilizer application pattern in this area. |
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