In the fall production of radish, the quality of radish is often degraded due to the influence of environmental conditions and improper cultivation measures. The phenomenon of cracking roots, crucibles, and black peels occurs, which affects the commodity value of radish. Quality deterioration causes and prevention measures are as follows: The dry roots of radish radish sprouted in the early stage of soil swelling, resulting in gradual hardening of the external cortex, slow internal cell growth, adequate rainfall during the prosperous period, rapid expansion of secondary xylem parenchyma cells, and hardening of the pericenmis and expansion of the pericardial surface. . Occurred in dry and wet uneven, first drought after the plot of land. Countermeasures: Pay attention to watering evenly during the growth of radish roots and avoid drying off. 2. The root of the radish is the phenomenon that the lateral root of the radish enlarges into a "bifurcation." Its formation is caused by many reasons: 1 The physical and chemical properties of the soil are poor, and the soil layer is shallow and with many gravels, hindering the normal growth of the main root, and the increase of nutrient supply to the lateral roots leads to bifurcation. 2 Insufficient decomposed organic fertilizer was applied. The heat produced by the fermentation of fertilizer in the soil burned out the growth point of the main root, resulting in the growth of lateral roots. 3 The planting was too dense and the seedlings were not timely. The radish roots were crowded and the main roots were bent, which led to the formation of overgrown lateral roots. 4 In the agricultural activities such as rushing grass, the main root growth point was damaged and the root part was forked. Countermeasures: Select the soil with deep, loose fertile loam to cultivate radish, and pay attention to intensive cultivation; select high-quality decomposed soil and miscellaneous fertilizer as base fertilizer; sow after seedling emergence and time seedling and seedling. 3. When the radish is planted in autumn, it is prone to crookedness in the conditions of high temperature and drought, pre-wet and dry conditions, or plots that are planted too early and are harvested too late. The main reason is that the water supply is sufficient in the early stage of radish growth, and the main root normally grows and expands; in the late period, the drought or the supply of fertilizer and water is insufficient, resulting in heart failure. When early twitches occur, photosynthetic products are rapidly sent to the top growth point, causing radish root nutrients to be lacking. Countermeasures: radish cultivation should choose the soil deep, loose and loose loam soil, and in the radish "broken belly" after the balance of fertilizer and water, to avoid uneven wet and dry; the main root fully grow and timely harvest. 4. There are two main reasons for black heart, black skin, and black skin: 1 Black rot. After the radish flesh root was damaged, the symptoms in the outer and middle parts were not obvious. After the incision, the catheter was darkened, the internal tissues were dry rot, and the pith was mostly black and hollow. 2 Soil compaction, the application of organic fertilizer is not fully decomposed, causing microbial activity is intense, consume a lot of oxygen, resulting in radish root hypoxia caused black heart, black skin. Countermeasures: 1 appropriate sowing, avoid continuous cropping, avoid planting in low-lying land. At the beginning of black rot, 72% of agricultural streptomycin was sprayed 3000 times, 7-10 days, and sprayed 3-4 times. 2 intensive cultivation to avoid soil compaction; application of high-quality organic fertilizer maturity as base fertilizer. 5. The hot radish during the growth process encountered hot, drought, lack of fat and other factors, leading to slow growth of the main root, high content of small mustard seeds and a strong spicy taste. Countermeasures: Rational fertilization to avoid prolonged drought in the soil. 6. Improper fertilization of bitterness, partial application of nitrogen fertilizer and phosphorus and potassium fertilizer deficiency, basic compounds of nitrogen in the radish main root increased, resulting in high content of bitter gourd and a bitter taste. Countermeasures: Adopt nitrogen, phosphorus and potassium fertilizers, and do not apply nitrogen fertilizer.
Goji extract (Lycium barbarum polysaccharides) is a water-soluble polysaccharide. The polysaccharide-based proteoglycans explicitly, a molecular weight of 22 ~ 25kD, arabinose, glucose, polysaccharides vinegar, galactose, mannose, xylose, rhamnose monosaccharide six kinds of chemical composition, the content of 20%, 50% (UV ). Pale yellow powder, hygroscopic. Water solubility: soluble in water.
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