Returning and Covering Whole Corn Stalk into Soil

A new technique of returning and covering whole corn stalk into soil in wheat/corn two crops one year area was studied. This paper emphasized on introducing the techniques of returning whole corn stalk into soil, necessary agricultural machinery, operational technology. And three year experimental results were also obtained. The study shows that the rotten rate of corn stalk in one year rotten period can reach more than 90%. And organic matter in soil can increase by 0.11% per year compared with traditional way. If plough depth is more than 20 cm, 95% of corn stalk can be covered under soil that is about 8 cm. This can guarantee the seeding quality of wheat. The basic seedlings and tillers are increased by 23 and 0.2 respectively compared with traditional way. The dry matter and one thousand seeds' weight after returning whole corn stalk into soil can increase by 8.95% and 1.33%. The winter wheat yield can increase by 3.81%. The input can decrease by 65.7% and 50% compared with corn composting and cutting stalk into pieces respectively. Therefore returning whole corn stalk into soil can save labor and time input, increase profit and save energy. This technique has been extended widely in Luancheng county.