祁连山北麓高寒牧区人工混播草地适宜播种量与施氮量的研究

STUDY ON OPTIMUM SOWING NORM AND AMOUNT OF NI1ROGEN APPLIED OF THE ARTIFICIAL MIXTURE SOWING GRASSLAND AT THE ALPINE PASTORAL AREA OF NORTHEM QILIAN MOUNTAINS

试区燕麦与箭舌琬豆混播条件下播种量与施Ｎ量关系的研究结果表明，播种量对产草量影响较大，施Ｎ量影响程度相对较小；播种量与施Ｎ量之间呈负交互效应，其最佳配比线性方程为Ｂ＝２７１．６３９８－０．１１９３Ｎ；鲜草产量最大时的播种量为２３７ｋｇ／ｈｍ￣２，施Ｎ量为２９０ｋｇ／ｈｍ￣２。

The relationship between sowing norm and arnount of nitrogen applied were studied in oat and Vicia sati- ra mixture sowing.The results showed that the affection of grass yield,the sowing norm was greater thanthe amount of nitrogen applied.There was a negative interaction effect between the sowing norm and theamount of nitrogen applied.The optimum linear equation was B= 271. 6398-0.1193N;The fresh grassyield reached peak as the sowing norm was 237 kg/hm￣2,and the nitrogen application amount was 290 kg/hm￣2。