Brassica rapa was selected as research object to study the effect of fertilizer application rate in high altitude zone of Qinghai Province.

• 在青海省高海拔农业区,以当地主要种植的白菜型油菜作为试验对象,进行增施不同用量钾肥的大田试验,研究其对油菜产量的影响及肥料效应。