| Effect of regulated deficit irrigation on growth and water use of pepper with mulched drip irrigation |
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| DOI：10.7606/j.issn.1000-7601.2018.03.05 |
| Key Words: pepper, mulched drip irrigation water regulated deficit growth indicators water-consuming regulation water use efficiency |
| Author Name | Affiliation | | WANG Shi-jie | School of Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHANG Heng-jia | School of Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | BA Yu-chun | Hongshuihe Administration in Minle County, Minle, Gansu 734500, China | | WANG Yu-cai | School of Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | HUANG Cai-xia | School of Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | XUE Dao-xin | School of Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | LI Fu-qiang | School of Engineering, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| The effect of regulated deficit irrigation on pepper growth, water consuming regulation, yield and water use efficiency has been researched with mulched drip irrigation through field experiments.The results showed that: Different degrees of water deficit regulation (WDR) at seedling, blossom and fruiting stage and full fruit period will be all decreased the pepper plant height, stem diameter and leaf area index(LAI), and the bigger degree of WDR, the plant height, stem diameter and LAI were smaller. Meanwhile, compared with the control treatment, the pepper biomass will be decreased with increasing degree of WDR. In which, the treatment (SRD2) as moderate WDR at seedling stage, the pepper biomass of ground parts and amount of root dry matter were significantly (P>0.05) decreased 40.32% and 24.99% , respectively. But the total pepper yield was 35322.79 kg·hm-2 which was the highest level with control treatment. Under different water treatment, the water consumption and water-consuming intensity in each pepper growth stage were total expressed as full fruit period >later fruit period >blossom and fruit stage >Seedling. Compared with the control treatment, the stage water consumption and consuming-intensity of pepper total will be notably decreased with increasing the degree of WDR. The moderate WRD treatment in seedling as (SRD2), the pepper water use efficiency and irrigation water use efficiency could be remarkably increased 8.45% and 9.20% respectively, also the pepper yield was at the highest level. Consequently, the SRD2 was the optimal irrigation mode in experiment scheme. |
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