Fertilizer application method of Guolan in the north

Although the demand for mineral elements in Guolan is small, it is indispensable, because mineral elements are the components of some parts of Guolan, such as nitrogen is an important component of protein, phosphorus is the component of nucleus, and so on. If you lack a certain element, you will have poor fertility and even die slowly.

According to the post-flowering analysis of the orchid, the plant contains 12.7% nitrogen, 0.29% phosphorus pentoxide and 1.10% potassium oxide. The contents of nitrogen, phosphorus and potassium in roots, pseudobulbs and leaves are as follows:

As shown in the above table, the amount of nitrogen, phosphorus and potassium per plant is very small, especially in the Yu butterfly group, the average nitrogen content per plant of the four varieties is only 0.188 grams, phosphorus pentoxide is only 0.043 grams, potassium oxide is only 0.163 grams. In a year, although the amount of fertilizer required for "from bud to south to adult plant" is not large, the fertilizer applied can not be fully utilized. According to the survey of crops, the utilization rate of nitrogen and potassium is about 30%. In addition, the author raises the orchid plant material for the emperor stone, volcanic stone, water slag and other granular plant materials, Hefei is small, in view of this situation, choose watering that is with fertilizer, that is, water, fertilizer peer. Choose soybeans (5.3% nitrogen, 1.0% phosphorus, 1.3% potassium) or bean cake (6.5% nitrogen, 1.5% phosphorus, 1.7% potassium) and sesame cake (5.8% nitrogen, 3.0% phosphorus, 1.3% potassium). Sometimes add a small amount of bone powder (nitrogen 4.05%, phosphorus 22.8% potassium 1.93%), animal hoof (14.5% nitrogen, 0.20% phosphorus, 0.30% potassium). Human hair (14.0% nitrogen, 0.08% phosphorus, 0.07% potassium) retting to produce nitrogen-based mother liquor, replenish nitrogen fertilizer; supplement phosphorus and potassium fertilizer with potassium dihydrogen phosphate (K033% LRO 51%), prepare fertilizer water containing 3/10000 to 4 nitrogen, potassium slightly lower than nitrogen, and irrigate. Trace elements are supplemented with "Kangpei No.1" made in the Netherlands. In order to make up for the deficiency of Kangpei No. 1, another jar of retting was used to make sundries, such as fruit containing organic acid (sour jujube, mountain plant, sour pomegranate, etc.), peel (apple peel, pear peel, watermelon peel, tomato peel, etc.), Amoy rice water, etc., to regulate both trace elements and pH. Except that the national orchid needs less fertilizer in winter, reduce the amount of fertilizer application, and increase the amount of fertilizer application when the growth rate is fast (nitrogen increased to 6/10000. Besides the corresponding increase of phosphorus and potassium, it is basically irrigated with this proportion of fertilizer and water all the year round. (Wang Tao, Shandong Academy of Agricultural Sciences)