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| DOI： |
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| Effect of Fertigation by Keeping Irrigating Water under Negative Pressure on Quality and Yield of Pepper Grown in Greenhouse |
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MA Yanhua, REN Xiujuan, YANG Shenjiao, ZONG Jie, SUN Hao, LV Mouchao, WU Dafu
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Henan Institute of Science and Technology, Xinxiang 453003, China; Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China
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| Abstract: |
| The impact of fertigation by keeping irrigating water under suction on yield and quality of peppers grown in pots were investigated. The suction was kept at 5 kPa (W2), 10 kPa (W3) and 15 kPa (W4) respectively, and the conventional irrigation (W1) was taken as the control (CK). In each irrigation method, nitrogen fertilizer was applied at rates of 168 kg/hm2 (N1), 336 kg/hm2 (N2) and 504 kg/hm2 (N3), respectively. The results showed that under the same suction, the content of fruit Vc in the pepper increased first and then decreased as the amount of nitrogen applied increased. In contrast, the content of soluble sugar and protein in the pepper increased with the nitrogen applied. The plant height, stem diameter, leaf number and pepper yield also increased with the amount nitrogen. Under the same nitrogen application rate, the content of Vc, soluble sugar and protein inthe pepper increased with the amount of irrigation; the plant height, stem diameter, leaf number and pepper yield also increased with the amount of irrigation. The content of Vc and soluble sugar in the pepper were the highest in the combination of W2 and N2; the content of protein in the pepper was the highest in the combination of W2 and N3; the yield was the highest in the combination of W2 and N3. Overall, the combination of W2 and N3 offers the highest pepper yield and quality. |
| Key words: chili pepper; fertigation; pepper quality; yield |
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