Effect of sowing date and seeding rate on the production performance of autumn-sown forage oats in Henan province
The purpose of this study,which included four sowing dates and three seeding rates,was to determine the best sowing dates and rates for autumn-sown forage oat in Henan province by examining the effects of various sowing dates and seeding rates on hay yield(HY),grain yield(GY),and some agronomic traits like the winter survival rate,tillering characteristics,and plant height(PH).The results showed that oats sown in later October had the best winter survival rate,however,winter survival rates for oats sown in early and late were lower and all sowing dates were over 90％overall.Correlation analysis showed that overwintering tillers were strongly positively linked with PH,GY and HY.Some tillers were frozen to death over the winter as a result of the early planting treatment,which lowered PH,GY and HY.The whole growth period of later sowing oats was shortened,and tillers,HY,GY were reduced.The later the sowing date,the greater the nutritional quality of the oats harvested during the middle of the milk stage.Early and late sowing caused GY and HY to decline after reaching their peaks in late October at 16.10 t/hm2 and 3.85 t/hm2,respectively.Oats grown in the fall could survive the winter in Henan province.The sowing date had the biggest impact on HY,GY and nutritional quality,but the seeding rate barely matters.The province of Henan could sow oats at a pace of 60～90 kg/hm2 in late October.
万方数据
维普
