Nutrient Supply to Potato Under Plastic-covered Ridge and Furrow Planting in Continuous Cropping System in Dingxi City
An experiment on nutrient supply to potato under plastic-covered ridge and furrow planting in continuous cropping system was conducted by analyzing tuber yield and soil nutrients. In order to al eviate yield loss in the second year, fertilizer should be applied at the rate of N 225.0 kg/ha, P2O5 187.5 kg/ha and K2O 150.0 kg/ha. At this application rate, tuber yield was increased by 14.9%and marketable tuber percentage by 5.9 percentage points compared with the control (N 180 kg/ha, P2O5 150 kg/ha and K2O 120 kg/ha). In the third year, the application rate should be at N 270.0 kg/ha, P2O5 225.0 kg/ha and K2O 180.0 kg/ha, and the yield was increased by 28.0%and marketable tuber percentage by 13.8 percentage points over that of the control.
NETL
NSTL
万方数据
维普
