| Cite this article: | 严程明,安东升,马海洋,等.季节性干旱区滴灌覆膜对菠萝园降雨入渗的影响[J].灌溉排水学报,0,():-. |
| yan cheng ming,AN Dongsheng,MA Haiyang,et al.季节性干旱区滴灌覆膜对菠萝园降雨入渗的影响[J].灌溉排水学报,0,():-. |
|
| |
|
|
| This article has been：Browse 2232Times Download 0Times |
|
|
|
| DOI： |
|
| Effects of drip irrigation under film mulching on rainfall infiltration of pineapple plantation in the seasonal arid area |
|
yan cheng ming1, AN Dongsheng1, MA Haiyang2, XU Lei1, XU Zhijun1, DOU Meian1
|
|
1.Zhanjing experimental station, CATAS;2.South subtropical crops research institute, CATAS
|
| Abstract: |
| 【Background】Mulching drip irrigation technology is one of the most important measures for dry farming, which can achieve precision irrigation and water-saving. However, the impermeability of plastic film can also change rainfall infiltration, increase rainfall runoff, limit rainfall infiltration, and reduce the utilization rate of natural rainfall, especially in the seasonal arid area, where rainfall is abundant, compared with the arid or semi-arid areas, The influence of film mulching on rainfall utilization may be more prominent, but there is no report on the influence of film mulching on rainfall infiltration in seasonal arid areas. It is of great significance to explore the influence of film mulching on rainfall infiltration for comprehensive evaluation of water saving effect of film mulching drip irrigation in seasonal arid areas and rational utilization of rainfall resources. 【Objective】In order to explored the influences and rules of drip irrigation under film mulching on rainfall infiltration of pineapple plantation in seasonal arid area，evaluate the water saving effect of plastic film mulching on Pineapple orchard under drip irrigation. 【Method】field trials of three treatments including conventional cultivation (CK), drip irrigation (DF) and drip irrigation under film mulching (MF) were carried out , In situ monitoring the changes of soil moisture content in 0-100cm soil layer of pineapple planting row by using the FDR moisture monitoring instrument. The effects of different treatments on rainfall infiltration and water redistribution of pineapple planting ridges were studied. 【Result】The results showed that :(1) Both drip irrigation and drip irrigation under film mulching for supplementary irrigation could limit the rainfall infiltration of pineapple planting rows, the total rainfall infiltration in 0-100 cm soil layer of pineapple planting ridge was 48.4% and 60.8% lower than that of conventional rain fed cultivation. but MF did not affect the water use efficiency and yield. Compared with CK and DF, the water agronomic productivity of MF was increased by 37.5% and 13.8%, and the field biomass was increased by 13.8% and 52.2%.(2) Drip irrigation under film mulching and drip irrigation can increase the rainfall infiltration ratio of deep soil (40-100 cm), the rainfall infiltration ratio of deep soil (40-100 cm) was CK (moderate rainfall: 3.5%; Heavy rain: 15.8%; Rainstorm: 30.3%), DF (moderate rain: 2.5%; Heavy rain: 16.7%; Rainstorm: 31.5%), MF (moderate rain: 15.7%; Heavy rain: 39.7%; Rainstorm: 43.0%); (3) The main influence depth of different rainfall levels on soil moisture (increasing range >4%) was CK (moderate rainfall: 30 cm; Heavy rain: 100 cm; Rainstorm: 30 cm), DF (moderate rain: 20 cm; Heavy rain: 30 cm; Rainstorm: 20 cm), MF (moderate rain: 10 cm; Heavy rain: 50 cm; Rainstorm: 20 cm), Among them, the influence depth and amplitude of heavy rain on soil moisture was the largest; (4) Under the condition of drip irrigation under film mulching, the soil moisture content of pineapple planting rows was more stable. In rainy season, the depth of soil moisture content fluctuated greatly of CK, DF and MF which were 0-30 cm, 0-20 cm and 0-10 cm. 【Conclusion】This study will provide important references for comprehensively evaluating the water-saving effect of drip irrigation under film mulching on cash crops in seasonal arid areas. |
| Key words: Drip irrigation with plastic film mulching; rainfall infiltration; Seasonal drought; Pineapple |
|
|
|
|
|
|
