Effects of Residual Impacts of Smash-ridging Tillage on Corn Growth and Yield
With the aim of providing data support for the improvement and utilization of saline-alkali land through tillage methods,this study investigated the residual impacts of smash-ridging tillage on the growth and yield of subsequent crops in saline-alkali land.Three treatments were set up during the rice planting season of the previous crop:traditional tillage(CK),smash-ridging at 35 cm(FL35)and smash-ridging at 50 cm(FL50).After rice harvest,corn was planted in the following year,and the growth of corn at different stages and yield after harvest were observed under different treatments.The results showed that smash-ridging tillage increased corn plant height,stem diameter,dry matter weight,panicle length,number of grains per panicle,weight of grains per panicle and weight of 100 grains,and it improved yield by increasing the number and weight of grains per panicle.The yields of corn grains in the different treatments were as follows:FL50(959.32 kg/667 m2),FL35(799.11 kg/667 m2),CK(606.82 kg/667 m2),with yields of FL50 and FL35 being 58.09%and 31.69%higher than CK,respectively,and the yield differences were extremely significant.Compared with traditional tillage,smash-ridging tillage promoted the growth of corn root,increasing the total root length,root surface area,root volume and average root diameter,in the order of FL50,FL35,CK.The root-shoot ratio was higher in the FL35 treatment and lower in the FL50 treatment.In summary,the residual impacts of smash-ridging tillage can promote corn root growth,facilitate the transfer of nutrients to the shoot,and thus increase yield.
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维普
