关键词: 播量, 行距, 饲草产量

Abstract: In order to clarify the suitable sowing amount,row spacing and sowing methods for the forage production of Avena sativa cv. Qingyan No.1,a field experiment with tow-factors test design of sowing amount and row spacing,that include 4 levels of sowing amount and 5 levels of row spacing to study the effect of different sowing amount and row spacing on forage yield of Avena sativa cv. Qingyan No.1,and improve the high-yield cultivation techniques of this variety in production and promotion. The results showed that the sowing amount and row spacing had significant effects on yield of fresh grass and hay in Avena sativa cv Qingyan No.1(P<0.05). The yield of fresh grass and hay of oats decreased with the increase of row spacing under the same sowing amount,and the yield of fresh grass and hay increased with the increase of sowing amount under the same row spacing;Among the treatments,sowing amount S4 and row spacing R1were the best. Under different sowing methods the broadcast sowing had the highest forage yield under the sowing amount S4,and the yield of fresh grass and hay reached 36.324 t·hm^-2and 11.330 t·hm^-2,respectively. Under the drilling sowing,the highest yield and the lowest yield of fresh grass and hay were significantly higher than the highest yield of broadcast sowing. The oat of Qingyan No. 1 could harvest the highest yield at the milk stage under different harvest period,and the fresh grass and hay could reach the 102.562 t·hm^-2 and 30.504 t·hm^-2,respectively,which were 4.51 times and 3.81 times higher than the lowest yield at heading stage. Plant height,stem thick,leaf area and total number of tiller increased first and then decreased with the increase of sowing amount under different sowing amount and sow spacing,and plant height and stem thick increased with the increase of row spacing,but leaf area increased first and then decreased and total number of tiller did not change significantly.

Key words: Sowing amount, Row spacing, Forage yield