Effects of Sowing Methods and Sowing Rates on Soil Water Use and Yield of Dryland Wheat in Arid Region
In order to clarify the effects of sowing methods and sowing rates on soil water storage and yield of dryland wheat,in the main area of sowing method,drilling(C1),ridging and furrowing(C2),wide sowing(C3)were set up.The sowing rate was sub area,with four treatments of 180(D1),240(D2),300(D3)and 360(D4)kg/ha.The difference of soil water storage,WUE and yield of dryland wheat were studied.The results showed that under the same sowing method,the sowing rate of 240 and 300 kg/ha increased soil water storage at jointing and flowering stages,soil water consumption at flowering-maturity stages,WUE,yield and its components increased.And there was no significant difference between the two treatments.Compared with conventional drilling,especially wide sowing,wide sowing and furrowing increased average soil water storage at jointing and flowering stages,water consumption and its proportion at flowering-maturity stages,improved average WUE and yield.Wide sowing increased average WUE by 23％and 3％,yield average by 25％and 3％,respectively,compared with drilling and furrowing.In arid region,the combination of wide sowing and sowing rate in 240-300 kg/ha were beneficial to the accumulation of soil water during the vegetative growth period of wheat,increasing soil water consumption after flowering,and increasing spike number and yield.
Dryland wheatWide sowingRidging and furrowingSowing rateSoil water useYield
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