| Intercropping cassava with short-term crops is one of the common cultivation patterns,isometric intercropping cassava planting soybeans is a regular intercropping pattern.This test innovation is the use of wide and narrow row planting cassava,making soybeans in the wide row.Experiments set up a conventional cassava row CK and three kinds of cassava wide and narrow rows(RC1,RC2 and RC3)of the main area test treatment,and non-planting soybean(TS0)and three soybean planting densities(TS1,TS2,and TS3).This article uses cassava Plantation 199 and Soybean Huachun 8 as experimental materials,daejeon experiment repeated four times.After two years of trials,the main findings are as follows:(1)Compared with conventional single cropping and conventional intercropping of cassava,the wide and narrow intercropping of cassava and soybean can increase the LAI of the intercropping population,and then increase the utilization of light energy of intercropping crops.At the same time,it can also increase the dry matter accumulation in the aboveground and underground parts of intercropping crops,improve the agronomic traits of soybean,and increase the number and quality of soybean nodules.During the symbiotic period between cassava and soybean,the width and width of cassava intercropping soybean will have a certain inhibitory effect on the growth and development of cassava.(2)Compared with conventional intercropping cassava,wide-narrow intercropping soybeans can significantly increase soybean yield per plant.Because of the difference in soybean planting density,the yield per unit area of wide and narrow intercropping soybeans is lower than that of conventional intercropping.However,optimizing the proportion of broad and narrow rows of cassava and the soybean planting density can still achieve the same level of production as conventional intercropping.At the same time,wide and narrow row cultivation can significantly increase the production of cassava.In addition,byoptimizing the wide and narrow row spacing of cassava and planting density of soybeans,wide and narrow intercropping can increase the protein and crude fat content of soybeans but reduce the content of cassava starch and cellulose.(3)Compared with conventional planting patterns,cassava intercropping soybeans can increase soil alkali-hydrolyzable nitrogen content,and implemented a cassava and soybean belt rotation during the year,but intercropping has limited effects on nitrogen nutrient uptake.In addition,due to the demand for phosphate fertilizers from soybeans,cassava demand more potassium fertilizers.Therefore,in the practical application of agricultural production,it is still necessary to supplement NPK fertilizers. |
