硼是植物生长不可缺少的微量元素之一,有促进植物生殖器官正常发育的作用。如果缺硼,油菜就会发生“只花不实”的生理病害。作物缺硼多发生于pH值大于7的土壤上;土壤中硼的有效度随土攘pH值升高而降低。针对油菜花(还有荚)严重脱落的问题,1981年在海拔2080米二阴地区的和政县三合公社周刘大队,土壤质地为中壤土,pH值8.6的地段上,安排了硼肥对甘兰型油菜奥罗品种的肥效 Boron is one of the trace elements indispensable to plant growth, promoting the normal development of plant reproductive organs. If the lack of boron, rape will happen, “only spent not real” physical disease. Boron deficiency in crops occurs mostly in soils with pH greater than 7. The effectiveness of boron in soils decreases with increasing soil pH. In order to deal with the problem of severe fall-off of rape (pod), in 1981, at the elevation of 2080 meters in the area of ​​Yin and the Chungli County triad commune Zhou Liu brigade, the soil texture was medium loam soil and the pH value was 8.6. Fertilizer effect on sweet orchid variety Oleander