1, too much water: due to the dry weather this year, watering too often (especially flooding), resulting in soil subsidence and consolidation, resulting in blocked growth of capillary roots, lack of nutrition, chlorosis.
2, excessive fertilization: improper fertilization leads to too high nitrogen fertilizer (urea, dung, etc.), high summer temperature, ground temperature will rise, resulting in capillary root damage, unable to normally absorb nutrients.
3, a large number of use of compound fertilizer: some fruit friends growing fertilizer using granular fertilizer, dig trenches, resulting in root injury, cut off nutrient sources, leaves will appear chlorosis.
4, root cancer: root diseases and insect pests. Some fruit trees suffer from root diseases and insect pests such as root cancerosis and root knot nematodes. Return to shrink, tree body trauma, resulting in insufficient nutrient supply and yellow leaves.
5, lack of element disease: iron deficiency causes chlorosis, due to planting density is too large, too dense planting makes the root system and root system cross each other, iron ion in the soil can not meet the root system needs, root growth is inhibited, nutrient absorption ability is reduced, causing leaf chlorosis. In addition, iron is fixed by oxidation, can not be absorbed by peach roots, will also show symptoms of yellowing on new leaves.
6, soil salinization: orchard fruit tree leaves yellowing with soil ph. Peach trees are most afraid of acidic and saline-alkali land. When the Hp value is less than 5 or greater than 9, the root growth of the soil is not developed. With the greater the acid-base polarization, the root and function of peach trees change from disorder to decay to aging to decay to death. Through soil testing, acidic soil can be adjusted and improved by using alkaline fertilizer or lime, or acid fertilizer can be used to improve the soil if the soil is saline-alkali.
7, applying multi-effect azole: peach results more, therefore, farmers to timely and fruit thinning, part of farmers to fruit thinning, leading to the GuaGuo too much, not only influence the quality of peach, the peach tree nutrition is also an excessive consumption, over time, not only will appear DaXiaoNian phenomenon, still can cause peach, weak blade yellowing phenomenon.
So how do we solve this?
In addition to the root reasonable fertilization, through the LEAF spraying of EDTA-Fe nutrient elements, is also one of the important channels to increase nutrition for peach trees, chlorophyll loss has an impact on plant photosynthesis, poor photosynthesis has a great impact on the growth and development of peach trees, quality and yield.
