摘要：The intensive cultivation and excessive inorganic fertilizer application in greenhouse agriculture have caused serious soil environmental problems, such as high salinity, low nutrient availability, etc. To test whether drip irrigation combined with buried straw layer can improve the soil environment, an experiment was conducted from May to October in 2016 in Yunxiao, Fujian province, south of China. The experiment included 3 drip irrigation quotas (II: 150m3/ha，I2:180m3/ha,I3:210m3/ha),and3bur-ied depths of dry straw (Dl: 20 cm, D2: 30 cm, D3: 40 cm). A flood irrigation treatment (abbreviated as CK) that in line with the local practice was used for comparison. The salt mass fraction in plough layer, soil electrical conductivity (EC), as well as the available N, P, K contents were observed. Results showed that, compared to CK, the treatments decreased soil salinity in plough layer by 6.4-26.7%, while increased soil available N, P and K contents by 14.744.2%, 5.0-19.1% and 6.7-26.2%, respectively. The lowest soil salt content (1.73 g/kg) in the plough layer at the end of the experiment was registered by I3D1. Moreover, I3D1 was the most effective treatment from the perspective of EC, the EC values above and below the straw layer under I3D1 were 1.56 dS/m and 1.92 dS/m, respectively, which were 36.6% and 22.0% lower compared to that of CK. We detected an extremely significant (p<0.01) effect of drip irrigation on the soil available N, P or K content, while the coupling effect of irrigation and straw burying was insignificant (P>0.05).The overall results suggested that drip irrigation combined with buried straw layer could create a beneficial growth environment for crops under greenhouse.
