A conservation tillage experiment was carried out in the sloping fields in Chongqing in order to explore the influence of conservation tillage on water loss and soil erosion

so as to provide some suggestions for soil and water conservation in Chongqing area. The field experiment was carried out in 2015 in Shizhu

Chongqing. The flue-cured tobacco variety Yunyan 87 was planted in the whole testing area

and sloping ridging was used. There were four treatments

i.e. T1

in which Lolium multiflorum Lam. was not grown

T2

in which L. multiflorum was grown between ridges

T3

in which L. multiflorum was grown on the rdiges

and T4

in which L. multiflorum was grown both between ridges and on the ridges. The results showed that growing L. multiflorum between ridges could effectively reduce runoff by 58.66% to 65.79%

sediment yield could be reduced by 62.50% to 68.78%

and the loss of NO3--N

NH4+-N

phosphorus and potassium in runoff could be reduced by 52.05% to 57.22%

51.03% to 59.98%

51.47% to 65.88%

and 66.93% to 69.33%

respectively. When L. multiflorum was grown on the rdiges

the runoff

the sediment yield

the loss of NO3--N

NH4+-N

phosphorus and potassium in runoff could be reduced by 54.32% to 61.59%

52.95% to 62.98%

63.73% to 77.49%

59.12% to 67.81%

62.84% to 76.22%

and 75.17% to 77.84%

respectively. When L. multiflorum was grown both between ridges and on the rdiges

the runoff

the sediment yield

the loss of NO3--N

NH4+-N

phosphorus and potassium in runoff could be reduced by 92.09% to 98.25%

86.43% to 95.91%

87.89% to 94.99%

90.19% to 97.06%

81.99% to 91.94%

and 91.52% to 93.88%

respectively. Overall

growing L. multiflorum both between ridges and on the rdiges is the best way of soil and water conservation.