Effects of Comprehensive Agro-techniques on Buckwheat Yield

Three treatments were tested in the experiment. i. e.. the amounts of nitrogen. phosphorus and seeds which were designed with a combination of the variables quadratic regression equations of the yields developed from common buckwheat (F. eaculR:RJ:mn Moench) and tartary buckwheat (F. totaricr.an). 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 8.06-8.91 kg • N • /mu. phosphorus 8.09-9.83 kg. PZ06/mu and seed amount 54. 800- 62. 700 grains/mu to common buckwheat. and nitrogen 6. 89-8.46 kg. phosphorus 5.84-8. 33kg. PzOs/mu and seed 38. 500-42. 900 grains/mu to tartary buckwheat. Key words: buckwheat nitrogen; phosphorus. seed amount. yield Buckwheat is a crop of high economic value. but traditionally its cropping was crude and its yield lower than other main crops. To develop buckwheat production and increase its yield. It is quite necessary to study the effect of comprehensive agronomic measures on the yield of buckwheat by means of systematic engineering under the conditions of other measures are optimum. and to standardize the regular techniques for high yielding of buckwheat. Materials and Methods Experiment was designed with the common notary combination of SQuare and regression (Ding Xiquan. 1986). three variables. i. e.. the amount of nitrogen (Xl). phosphorus (X2) and seed (X3). were taken. The levels and their signs were shown in Table 1