The roots of sweet potato are deep and wide, and the stems can be rooted in the habitat. The fertility is very strong, so it is drought-tolerant and tolerant. Practice has proved that the demand for nitrogen, phosphorus and potassium in sweet potato is the highest in potassium and the second in nitrogen. Phosphorus is second, the ratio of strontium, phosphorus and potassium in the growth process is generally 1:1:2.5. However, the functions of the three elements are different and cannot be replaced by each other.
The function of one or three elements and the symptoms of deficiency
1. Nitrogen is an important component of protein. If the supply of nitrogen is insufficient, the old leaves will first appear green, the number of leaves and branches will decrease, the leaves will shrink, the internodes will shorten, the leaves will be prone to yellowing and premature aging, and further develop into old leaves. Shedding, reduced photosynthetic efficiency, seriously affecting yield.
2. Phosphorus is an important component of sweet potato cells, which can promote the development of roots, enhance photosynthesis, promote the synthesis, transportation and storage of carbohydrates, increase the starch content of potato chips and increase yield. If the phosphorus is lacking, the leaves will become smaller, dark green, tarnished, and the stems will be stretched. Afterwards, the old leaves will have large yellow spots and become purple, and will soon fall off.
Potassium is the most important element affecting the yield and quality of sweet potato. It can prolong the functional period of leaves, keep the stems and petioles young and tender, promote the expansion of potato chips, accelerate the transportation of photosynthetic products, and promote the synthesis and accumulation of starch. Improve the disease resistance and storage performance of sweet potato. In the absence of potassium, the leaves are small, the internodes and petioles become shorter, the leaves are dark green, and brown spots appear on the back of the late leaves.
Second, fertilization technology
According to the local soil conditions, climatic conditions and the characteristics of different varieties of sweet potato growth, fertilizer should be applied reasonably. Only by mastering the principles of “pre-promotion, central control and late prevention and early premature aging†can the best yield increase effect be achieved. Specifically grasp the following aspects:
1. Add base fertilizer. Mainly organic fertilizer, supplemented by inorganic fertilizer. The application amount of base fertilizer accounts for more than 80% of the total fertilization amount. According to the output of sweet potato of 667 square meters (1 mu), it is 2500-3500 kg, and the base fertilizer should be 3000-4000 kg, and the three-element compound fertilizer 50 kg. Organic fertilizers mainly include soil fertilizers, manure fertilizers, and human and animal manure. They are all kinds of complete fertilizers. They are gradually decomposed after application and continue to exert fertilizer efficiency. They are very suitable for the long growing period of sweet potato, but they require full maturity, so the farmers said: "Sweet potato I like the sewer in the next year. The application method is stratified and staged application, that is, 1/2 of each of the ploughing and ridges, the crude fertilizer is used as the base, the fertilizer is applied, and the combination of depth and light can effectively meet the sweet potato front, middle, and The need for nutrients in the later stages promotes the normal growth of sweet potatoes.
2. Reasonable topdressing. Early application of seedling fertilizer, strong seedling fertilizer, generally 3 to 4 days to 30 days after planting, pouring thin human excrement 2 times, each time according to the seedlings per 667 square meters plus urea 1 ~ 3 kg. Re-application Potato fertilizer and long potato fertilizer generally account for 20% of the total fertilization amount. The time is about 50 days after planting. The side of the ridge is ground and fertilized, also called the edge fertilizer. It is also possible to apply crack fertilizer in time when the sweet potato ridge is back cracked, and generally apply manure and manure with appropriate amount of ammonium bicarbonate.
3. Root dressing. Generally, in the late growth stage of sweet potato, the leaf surface is sprayed with 0.2% potassium dihydrogen phosphate solution, 0.5% urea solution and 2% to 3% calcium superphosphate solution. The spraying time should be in the evening, spray every 7 to 10 days. Times, a total of 2, 3 times.
The function of one or three elements and the symptoms of deficiency
1. Nitrogen is an important component of protein. If the supply of nitrogen is insufficient, the old leaves will first appear green, the number of leaves and branches will decrease, the leaves will shrink, the internodes will shorten, the leaves will be prone to yellowing and premature aging, and further develop into old leaves. Shedding, reduced photosynthetic efficiency, seriously affecting yield.
2. Phosphorus is an important component of sweet potato cells, which can promote the development of roots, enhance photosynthesis, promote the synthesis, transportation and storage of carbohydrates, increase the starch content of potato chips and increase yield. If the phosphorus is lacking, the leaves will become smaller, dark green, tarnished, and the stems will be stretched. Afterwards, the old leaves will have large yellow spots and become purple, and will soon fall off.
Potassium is the most important element affecting the yield and quality of sweet potato. It can prolong the functional period of leaves, keep the stems and petioles young and tender, promote the expansion of potato chips, accelerate the transportation of photosynthetic products, and promote the synthesis and accumulation of starch. Improve the disease resistance and storage performance of sweet potato. In the absence of potassium, the leaves are small, the internodes and petioles become shorter, the leaves are dark green, and brown spots appear on the back of the late leaves.
Second, fertilization technology
According to the local soil conditions, climatic conditions and the characteristics of different varieties of sweet potato growth, fertilizer should be applied reasonably. Only by mastering the principles of “pre-promotion, central control and late prevention and early premature aging†can the best yield increase effect be achieved. Specifically grasp the following aspects:
1. Add base fertilizer. Mainly organic fertilizer, supplemented by inorganic fertilizer. The application amount of base fertilizer accounts for more than 80% of the total fertilization amount. According to the output of sweet potato of 667 square meters (1 mu), it is 2500-3500 kg, and the base fertilizer should be 3000-4000 kg, and the three-element compound fertilizer 50 kg. Organic fertilizers mainly include soil fertilizers, manure fertilizers, and human and animal manure. They are all kinds of complete fertilizers. They are gradually decomposed after application and continue to exert fertilizer efficiency. They are very suitable for the long growing period of sweet potato, but they require full maturity, so the farmers said: "Sweet potato I like the sewer in the next year. The application method is stratified and staged application, that is, 1/2 of each of the ploughing and ridges, the crude fertilizer is used as the base, the fertilizer is applied, and the combination of depth and light can effectively meet the sweet potato front, middle, and The need for nutrients in the later stages promotes the normal growth of sweet potatoes.
2. Reasonable topdressing. Early application of seedling fertilizer, strong seedling fertilizer, generally 3 to 4 days to 30 days after planting, pouring thin human excrement 2 times, each time according to the seedlings per 667 square meters plus urea 1 ~ 3 kg. Re-application Potato fertilizer and long potato fertilizer generally account for 20% of the total fertilization amount. The time is about 50 days after planting. The side of the ridge is ground and fertilized, also called the edge fertilizer. It is also possible to apply crack fertilizer in time when the sweet potato ridge is back cracked, and generally apply manure and manure with appropriate amount of ammonium bicarbonate.
3. Root dressing. Generally, in the late growth stage of sweet potato, the leaf surface is sprayed with 0.2% potassium dihydrogen phosphate solution, 0.5% urea solution and 2% to 3% calcium superphosphate solution. The spraying time should be in the evening, spray every 7 to 10 days. Times, a total of 2, 3 times.
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Porcelain Mosaic Glazed Mixed small size
Product Attributes
Model No.:PCM series Brand Name:PARCOSTILEWarranty Service:More than 5 yearsAfter-sales service:Online technical support, othersize:30 X 30MMstyle:Chinese Style, Classic, EuropeApplications:External Wall, Interior Wall, RoomEngineering solution capability:graphic design, OthersApplication scenario:Hotel, Villa, Apartment, Office Building, Hospital, School, Mall, Sports Venues, Leisure Facilities, Supermarket, Workshop, Park, Farmhouse, Courtyard, Kitchen, Bathroom, Home Office, Living room, Bedroom, Dining, Babies and kids, Exterior, Entry, Hall, Home Bar, Gym, Laundrydesign style:Modern, Rustic, Europeanplace of origin:Chinashape:SquareSIZE:23*23*6/300*300mm
Supply Ability & Additional Information
Place of Origin:CHINAProductivity:1000 square meter per monthSupply Ability:1000 square meter per monthPayment Type:L/C,T/T,D/PIncoterm:FOB,CFR,CIF,EXWCertificate:SASO QM ISOHS Code:6907219Transportation:OceanPort:FOSHAN,JIUJIANG,,CHINA
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Series name:Porcelain Mosaic
Design: Elegant
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