Effects of Comprehensive Agro-techniques on Buck wheat Yield

Yin Jiang;Tian Changye(Bashang Agricultural Institute,The Zhangjiakou Prefecture of Hebei,Zhang jiakou 075131)Ma Wenqi(Zhang Jia Kou Agricultural College,Zhang jiakou 075131)

uckwheat;nitrogen; phosphorus;seed amount;yield

Three treatments were tested in the experiment,i.e.,the amounts of nitrogen,phosphorus and seeds which were designed wih a combination of the variables quadratic regression equations of the yields developed from common buchwheat(F.esculentun Moench)and artary buckwheat(Fi tataricum),separately.In the light of these two equations,the effects of each of the cultivating measures were identified,and from the most to the least,they were ranged in the order of nitrogen amount,phosphorus amount and seed amount for common buckwheat, while for tartary buckwheat,the order is seed amount,phosphorus amount and nitrogen amount.It is concluded that the common buckwheat yield increased with the amount of nitrogen or phosphorus added,and the interaction effect of nitrogen and phosphorus is positive.With the help of computer,51 sets(to common buckwheat,yield≥200kg/mu)and 39 sets(to tartary buckwheat,yield≥250kg/mu)of cultivating scheme have been obtained.The optimum comprehensive measures are those of nitrogen 8.06￣ 8.91kg.N./mu,phosphorus 8.09￣9.83kg.P2O5/mu and seed amount 54,800￣62,700 grains/mu to common buckwheat and nitrogen 6.89￣8.46kg,Phosphorus 5.84￣8.33kg.P2O5/ mu and seed 38,500￣42,900 grains/mu to tartary buckwheat.