Strawberry deficiency symptoms The external morphology of nitrogen deficiency changes with leaf age and degree of nitrogen deficiency. Young leaves or immature leaves, when nitrogen is insufficient, the leaves are more green, and the vigorously growing leaves turn green from green to yellow. The petioles and calyxes are reddish, and the serrated leaves turn green, developing from the outside to the inside, and some of the whole leaves are bright red or orange-red, and the fruit is small in taste. Phosphorus-deficient plants have smaller leaves, darker green leaves, and slower growth. Flowers and fruits are also smaller than normal-grown strawberries, and fruit is occasionally bleached. Severe phosphorus-deficient strawberries, some plants appear black leaves with a shiny, lower leaves pale pink to purple. The leaves of the plants lacking potassium appear dark brown and dry. Some of them develop into burns. Some develop towards the center between the veins of most leaves, some from leaf to petiole become dark and become dry or necrotic, and the fruit color is dark. Soft texture, light taste. Calcium-deficient plants have few root hairs, slow growth, and frequent occurrence of leaf char in the fertility process. Symptoms are leaf shrinkage, leaf color chlorosis, light green or pale yellow boundaries, and brown spots on the petiole of diseased leaves. , syrupy water droplets often overflow, the lower leaves turn from light green to yellow and then dry. Post-nutrition method for strawberry Note that the need for balanced fertilization of potassium on the soil is the largest, followed by nitrogen and phosphorus, and the third is calcium. Of course, the amount of trace elements needed for conservation cultivation is 1.7:1:2.2 for nitrogen, phosphorus, and potassium. The proportion of nitrogen, phosphorus, and potassium needed for open cultivation is 2.9:1:3.9. Both types of cultivation methods reflect high sensitivity to potash fertilizer. Therefore, it should be used as a reference for balanced fertilization. The use of organic fertilizer as basal fertilizer has a long growth period, high yield, and high market demand for quality. When applying fertilizers, it should be based on decomposing farmhouse manure, column excrement, and human excreta, with an application rate of 4000 to 5000 per acre. Kg, or cake fertilizer 50 to 75 kg, with 15 kg of multiple compound fertilizer or biological organic compound fertilizer applied 50 to 75 kg, with multiple compound fertilizer 10 to 15 kg. Acidic soil should increase calcium, apply lime or plaster 50 kg per mu. Seeding the seedlings of the seedlings after the planting of the seedlings has high requirements for inorganic nutrition. Before the first flowering, it should chase multiple compound fertilizers from 10 to 15 kilograms, and the deficiencies of nitrogen deficiency should be about 5 kilograms of urea or 250 to 300 kilograms of human waste. , Phosphorus topdressing superphosphate 10 ~ 15 kg, potassium topdressing potassium sulfate 7.5 ~ 10 kg. Another can be sprayed 0.2% ~ 0.3% of potassium dihydrogen phosphate solution 2 ~ 3 times. Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone YT-T13 YT-T13 Shenzhen Sunshine Technology Co.,Ltd , https://www.szyatwin.com