覆盖方式对烟草光合速率及耕层环境的影响

以烤烟品种中烟100为材料,在大田环境下,采用随机区组设计,设置秸秆覆盖(JG)、塑料地膜覆盖(DM)、液体地膜覆盖(YM)和露地栽培(CK)4种栽培方式,研究不同覆盖方式对烟草光合速率、荧光特性、土壤含水量、土壤脲酶活性、土壤碱性磷酸酶活性、土壤过氧化氢酶活性的影响.结果表明:团棵期,植株叶片光合速率以地膜覆盖处理最...

Effect of Mulching Method on Photosynthesis and Soil Environment of Tobacco

In this study,Zhongyan-100 was chosen as the test materials.Four cultivation methods,straw mulch(JG),plastic film mulching(DM),the liquid plastic film mulching(YM) and open field cultivation(CK) cultivars were set up to evaluate the effect of mulching method on tobacco photosynthesis,fluorescent characteristic,water content of soil as well as the soil enzyme,etc.by using randomized block design in field conditions.The results show that photosynthesis rate under the plastic film covering(2.74 μmol/(m2·s)) was higher than that of the other treatments at the Mission stage.While after the Tip pruning stage,straw mulch treatment(2.85 μmol/(m2·s)) was best,the same trend can be observed between photosynthesis rate and fluorescent characteristic under the different cultivation methods.At the Mission stage,plastic film covering treatment improved soil enzyme activity significantly but the difference was little among the different mulch treatments;each enzyme activity under straw mulch treatment was higher significantly than the other treatment at Fast growing period and displayed consistency across the different soil layers.The difference was less between the mulching plastic cover and the fluid film mulch treatment,but three kind of mulch treatments were obviously higher than comparison treatment.The different mulch treatment can enhance the soil moisture content,but the difference varied a lot among the different mulch treatments.The effect performance is DM>YM>JG>CK.Water content increased along with the depth of soil,but the difference among each mulching methods will became smaller at the 30-40 cm soil layer.In comparison,the best mulching was plastic in the earlier stage,while straw mulching was the optimal in the later stage.