| Effects of different drip irrigation fertilization patterns on growth and water and fertilizer utilization of rape |
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| DOI：10.7606/j.issn.1000-7601.2020.02.04 |
| Key Words: drip fertigation rape water and fertilizer utilization growth physiology yield |
| Author Name | Affiliation | | WANG Haoxiang | College of Water Conservancy and Architectural Engineering,Northwest A&F University,Yangling,Shaanxi 712100,China | | ZHANG Xinyan | College of Water Conservancy and Architectural Engineering,Northwest A&F University,Yangling,Shaanxi 712100,China | | NIU Wenquan | College of Water Conservancy and Architectural Engineering,Northwest A&F University,Yangling,Shaanxi 712100,China；Institute of Soil and Water Conservancy, Northwest A&F University,Yangling,Shaanxi 712100,China | | TIAN Tong | College of Water Conservancy and Architectural Engineering,Northwest A&F University,Yangling,Shaanxi 712100,China |
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| Abstract: |
| The effects of different drip irrigation system layout and water and fertilizer supply patterns on winter rape growth, yield, soil moisture, and physical and chemical properties were studied by dry\|crop greenhouse experiment. A 3×3 orthogonal experimental design was adopted including three kinds of drip irrigation pipeline layouts of G1 (one tube and one row), G2 (one tube and two rows), and G3 (one tube and three rows), three irrigation levels of W1 (50% ET0), W2 (75% ET0) and W3 (100% ET0), and 3 fertilization levels （N∶P2O5∶K2O∶H3BO3） of F1 (300∶190∶110∶8 kg·hm2), F2 (450∶280∶160∶12 kg·hm2), and F3 (600∶380∶220∶15 kg·hm2).We studied the rape growth and development, physiological indicators, dry matter quality, yield, water and fertilizer use response to different drip fertigation modes. The results showed that, irrigation and fertilization had significant effects on rape physiological growth, and yield compared to capillary layout. Rape growth and yield increased with increasing irrigation. High water (W3) treatment was more conducive to rape growth. The efficiency was obviously lower than that of the middle and low water treatments. The average water use efficiency of W1 treatment was 37.73% and 76.36% higher than that of W2 and W3. The growth and yield were positively correlated with the fertilization amount. The maximum yield was 5 430 kg·hm-2 in G1W3F3 treatment. G2W2F3 treatment had a yield of 5 400 kg·hm-2, which was 0.5% lower than G1W3F3 treatment did but saved 25% of water, and had higher water use efficiency and fertilizer partial productivity.According to the comprehensive analysis, from the perspective of high water\|saving economy, the combination of G2W2F3 can be used as a suitable drip fertigation mode under the experimental conditions. |
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