覆盖集水措施对烟田土壤水分时空分布和利用效率的影响

采用田间试验研究了覆盖集水栽培措施对烟田土壤含水量、烤烟产量及水分利用效率的影响。结果表明．垄下栽烟、垄上覆盖地膜、烟行覆盖秸秆与传统的垄上栽烟方式相比较．能显著增加烟株生长不同时期烟田0～100cm土层土壤贮水量和各土层土壤含水量．降低烟田土壤水分蒸散量．提高烟叶产量、上等烟比例和水分利用效率．是适宜于干旱地区烤烟生产的集水覆盖栽培技术。

Effects of Cultivation of Water Collection by Mulching on Spatio-Temporal Distributing of Soil Moisture and Water Using Efficiency in Tobacco Fields

Based on the field experiment,the effects of cultivation technique of water collection by mulching upon the soil water content,yield of flue-cured tobacco field and WUE were studied.Research results showed that: with conventional cultivation as contract,under the treatment which planting tobacco in furrow with ridge mulched by film and furrow mulched by straw,the water content in 100 cm of soil profile and the soil moisture within different layers in different periods increased,the tobacco field evapotranspiration decreased,the yield,the ratio of the superior class leaves and the WUE of flue-cured tobacco yield increased too.The treatment was the cultivation technique of water collection fitting for the flue-cured tobacco planting in arid region.