Study on the rice growth in rice-crab culture system irrigated by pond tail water

Abstract:

In order to explore the significant effects of new rice-fish culture modes on rice growth and yield,the practice of a new rice-fishing culture model was carried out in Guangming Fishing Village, Helan County, Yinchuan City, Ningxia Hui Autonomous Region. Rice paddy irrigation patterns affect rice growth and yield under different conditions. The experiment divides the fish pond water once every 5 days, irrigates the fish pond water every 7 days and does not irrigate the fish pond water.Rice planting variety is "Jihong 6". The average yield per mu of rice is 1089.93/667m². The overall yield per mu is higher than that of paddy fields. The irrigation period is 5 d for irrigation once>7 d for irrigation once > no irrigation of fish pond water. The upper part of the biomass is larger than the paddy field. There were different degrees of correlation between rice yield and yield components, and the overall correlation of gray correlation was from 0.576 to 0.907. the correlation between The root stem constituent factors and rice yield from strong to weak is:root length (0.907)> stem base outside diameter (0.863)=panicle base outside diameter (0.863)> stem length (0.846)>Plant height (0.829)> panicle length (0.776), the root stem constituent factor with the highest correlation with rice yield is root length, and the smallest correlation is the length of the stem; the correlation between rice yield component and rice yield is from strong to weak. The order of ordering is:effective panicle number (0.869)> grain number per ear (0.847)> biomass (0.813)> seed setting rate (0.806)> thousand grain weight (0.759)> hills per hectare (0.715)> root dry weight (0.625)> panicle setting rate (0.576), the yield component with the highest correlation with rice yield is the effective panicle number, and the smallest correlation is the panicle setting rate.