The lack of understanding of vegetable deficiencies by vegetable farmers often treats deficiency deficiencies as diseases, delays the timing of remediation, reduces the quality of vegetables, and causes certain economic losses. Agrochemical technicians of the Northwest Research Institute of Chemical Industry, through years of tracking cultivation, present the common symptoms of nitrogen, phosphorus, and potassium deficiency in vegetables as follows and share it with a large number of vegetable farmers. Nitrogen deficiency showed that the plants were short, with slow growth, short stems, and many woody leaves; the leaves were small and pale in color, gradually yellowing from the old leaves to the new leaves, and the bases of the leaves were yellow. The knotted vegetables are not easy to bear or poorly knotted; the roots of root vegetables are not easy to expand; purple leaves appear in the old leaves and stems of cabbage (such as cabbage, cauliflower, etc.); solanaceous fruits also show delayed flower and fruit development, abnormal precocity, There are few seeds and low grain weight. Phosphorus deficiency symptoms did not show significant nitrogen deficiency. Plants grow slowly, dwarf; leaves dark green, dull, the lower leaves become purple or reddish brown; flowers, fruit less, late fruit ripening; poor lateral root growth, root vegetables roots do not inflate, delayed fruit and vegetable delay and fruit ripening delayed . For example, when the potato is deficient in phosphorus, the leaves are dark green, the tubers become smaller, and the storability is poor; when the tomato lacks phosphorus, the veins are purple. The lack of potassium causes the texture of vegetables to become soft, prone to lodging, and has poor cold resistance and drought resistance. The appearance of the old leaf tip and edge yellow, after browning, brown spots or patches often appear on the leaves, but leaf color near the middle of the leaf leaves often change, severe young leaves also showed the same symptoms. Symptoms of leafy vegetables occur at the early stage of growth. For example, the edge of the outer leaves of the cabbage first turns yellow, then gradually extends inwards, and the leaf margins wither, but the symptoms often appear after the spherules; the root vegetables appear symptoms when the roots swell; Vegetables began to have symptoms at the beginning of the ball, the leaves shrank, and the hands touched hard; fruits and vegetables did not show symptoms at the beginning of the birth, but they only appeared on the old leaves when the fruit was inflated. Bear Bile,Bird'S Nest,Velvet Antler,Animal Species Henan Qiancuntang medicial technology co.ltd. , https://www.qctchineseherb.com
Identification of vegetable deficiencies