Effects of soil moisture conservation measures on temporal and spatial characteristics of plantation in Shannan region of Xizang Autonomous Region——Taking Cedrus deodara plantation as an example
In order to investigate the change of soil moisture content under different soil moisture conservation measures in Shannan region of Xizang Autonomous Region the four mulching and drip irrigation treatments were designed for Cedrus deodara plantation:straw mulching,mulching film,drip irrigation,and mulching film plus drip irrigation,along with a control treatment.The soil moisture content in the 0～20 cm and 20～40 cm soil layers of the C.deodara plantation were tested.The results showed that the soil moisture content in C.deodara plantation varied depending on the soil moisture conservation measures used,and was distributed in a non-uniform manner over the course of a year.The effects of different measures of soil moisture conservation also varied depending on the season.The soil moisture content in the 20～40 cm soil layer was highest in the treatments that used mulch and drip irrigation,followed by those that used mulch and straw mulch,drip irrigation alone,and finally the control treatment.The soil moisture in the 0～20 cm and 20～40 cm soil layers reached 29.32%and 29.7%,respectively,which was significantly higher than the control.The soil moisture content varies greatly across different soil layers throughout in different season.In spring and winter,the soil moisture content of the shallow and deep soil layers was similar.However,in summer,the soil moisture content of the shallow soil layer(0～20 cm)was lower than that of the deep soil layer(20～40 cm).The measures of mulch combined with drip irrigation was the most effective method for retaining soil moisture in C.deodaraplantations in the Shannan region.
measures for preserving soil moistureplantation forestsoil moisture contentcoverdrip irrigation
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