论文部分内容阅读
果树从土壤中吸收的矿质营养元素,包括氮、磷、钾、钙、镁、硼、锰、铜、铁、锌、钼以及钠、氯、硫等14种,但主要是前列11种。我国广大果产区,同世界各国的果产区一样,普遍存在着营养失调的病症,不仅影响果树产量和果品品质,而且还导致许多生理病害。据我们在全省果区调查,发现苹果树叶片黄化失绿造成减产的果园高达80％;因缺钙引起的水心病、苦痘病等发病率为30—40％;因缺锌引起小叶病在晋中果区的发
The mineral nutrients absorbed by the fruit trees from the soil include 14 species of nitrogen, phosphorus, potassium, calcium, magnesium, boron, manganese, copper, iron, zinc, molybdenum and sodium, chlorine and sulfur but mainly the top 11 species. Like most fruit producing areas in the world, the vast majority of fruit producing areas in our country have widespread malnutrition. They affect not only fruit tree yield and fruit quality, but also many physiological diseases. According to our survey in the province’s fruit areas, we found that the loss of yellowing of apple tree leaves orchards caused by up to 80% of the cut; due to calcium deficiency caused by water heart disease, bitter pox disease incidence of 30-40%; zinc deficiency caused by leaflets Disease in Jinzhong fruit area hair