Longevity vegetable (leaf sweet potato) is an annual herb of the family Convolvulaceae. It is native to Brazil, Peru, and other places in South America. During the Ming Dynasty (1580 AD), Chen Zhenlong from the Philippines introduced Guangdong and Fujian. Planting, mainly for the consumption of potato, in recent years, Hong Kong, Guangdong, Guangxi and other places to eat tender stem tips and young leaves, because of its rich nutrition, health care function, delicious taste Hong Kong as a Queen of vegetables, sold in many leafy vegetables The highest price, Changshou County in China - Guangxi Bama County as a common edible vegetables, hence the name longevity food.
First, botanical traits Leaf heart-shaped, stem round or hexagonal, sprawling, stem length up to 10 meters or more, there is a branching ability between leafhoppers, petiole length 15 to 25 cm, leaves and stems are divided into green and purple two Types.
Second, the requirements of the environmental conditions temperature and climate conditions, the optimum growth temperature 23 ~ 28 °C, the maximum does not exceed 35 °C, the minimum in more than 15 °C, night 10 ~ 15 °C; hi strong light conditions, strong drought resistance , but in wet conditions, high yield, good quality; suitable for loose, fertile loam soil cultivation, the need for fertilizer, nitrogen, phosphorus, potassium and trace elements in conjunction with its nitrogen, phosphorus, potassium absorption ratio of 1: 0.4:1.
Third, the selection of varieties Not all sweet potato varieties stems and leaves can be eaten, and some varieties of food taste bitter, poor palatability. Appropriate edible varieties should have the following characteristics: tender young leaves tender, good palatability, bright color, no hair, axillary buds strong ability to regenerate, vigorous plant growth, high stem and leaf yield. At present, Jingshu 4 Lushu 7 and other varieties are more suitable for leaf use.
IV. Breeding methods There are two kinds of breeding methods. Cutting propagation is the main method. From the plants, strong stems are cut. Each section is about 15 centimeters long, with 3 to 4 sections, and the base is cut into horseshoe-shaped. Fuhuang fulvic acid soaked for 10 to 20 minutes, is conducive to rooting and inhibition of bacteria, and then cuttings in the sandy loam seedbed, the ground temperature 16 ~ 23 °C, temperature 20 ~ 28 °C, about 30 days after rooting survival transplant planting. Seed-bearing seedlings can also be used, but the work-product propagation coefficient is also low.
V. Site Preparation Planting in the open and protected areas with good drainage and irrigation conditions, apply 3,000 kg of organic fertilizer under culling per 667m2, deep plowing, and dosing with soil to make it 1.3 meters wide and 6 to 8 meters long. The flat. Two rows of each row were planted on the shelf, with an average row spacing of 65 cm and a spacing of 20 cm; each row was planted with 4 to 5 rows, with a plant spacing of 20 cm, and 2 11,000 plants per 667 meters. Select sunny planting, watering after planting.
Six, field management
1. After cultivating loose soil in the cultivator, the cultivator loosens the soil twice and the depth is 4 to 5 cm. The combination removes the weeds.
2, watering seedlings cultivating seedlings after 15 days or so, to promote root growth, after every 10 days or so poured, often soil moisture, should not be poured water. Drain the water immediately after the summer rain.
3, top dressing after the seedlings every 667 meters 2 points Shi special activity of chicken manure 200 kg, during the harvest every 15 days fertilization 1 time, every 667 meters 2 Shi Shi a special brand of active chicken manure 100 kg or nitrogen, Phosphorus, potassium ternary compound fertilizer 15 kg, can be combined with watering. Spray 0, 2% potassium dihydrogen phosphate once every 7 to 10 days and spray 3 to 5 times.
4. Hanging vines When the plant is up to 25 centimeters or more, use a plastic rope to cover the lower part of the plant to fix the plant, and then grow it in time with the growth. Bamboo scaffolding can also be used to allow plants to grow upright and make full use of space.
7. Harvest When the plants reach 40 cm in height, the shoots and young leaves can be harvested one after another, bundled or boxed for sale, generally harvested for about 7 days, and the harvest period can reach more than 6 months. 667 Rice 2 produces 3000 to 4000 kg.
Eighth, nutritional value and health care function Each 100 grams of edible portion contains 4.8 grams of protein, 0.7 grams of fat, 170 mg of calcium, 47 mg of phosphorus, 3.9 mg of iron, 6.7 mg of vitamin A, 503 mg of potassium, sodium 19.6 mg, 61.6 mg of magnesium, 0.4 mg of copper, 0.3 mg of zinc, 1.19 mg of manganese, 0.83 mg of cesium, ranking first in 14 kinds of vegetables such as cucumber, eggplant, tomato, and spinach .
Changshou Cai has the functions of regulating immunity, can improve the body's resistance to disease, delay aging, increase blood platelet, stop bleeding, anti-cancer, lowering blood sugar, laxative, diuresis, lactation, detoxification, prevention and treatment of night blindness and other health functions.
Usage: 1 salad. Wash with water after the first boiled, cut garlic, salt, MSG, sesame oil and other seasoning salad, very delicious; 2 fried food. After the oil and water, with sea cucumber, mushrooms and other spices rush fire stir fry; 3 for stuffing. After the boiling water, chopped and chopped to make soft and tender filling; 4 for soup. After boiling water, add sea glutinous rice or eggs as soup. The taste is smooth and tender, and the taste is fresh.
First, botanical traits Leaf heart-shaped, stem round or hexagonal, sprawling, stem length up to 10 meters or more, there is a branching ability between leafhoppers, petiole length 15 to 25 cm, leaves and stems are divided into green and purple two Types.
Second, the requirements of the environmental conditions temperature and climate conditions, the optimum growth temperature 23 ~ 28 °C, the maximum does not exceed 35 °C, the minimum in more than 15 °C, night 10 ~ 15 °C; hi strong light conditions, strong drought resistance , but in wet conditions, high yield, good quality; suitable for loose, fertile loam soil cultivation, the need for fertilizer, nitrogen, phosphorus, potassium and trace elements in conjunction with its nitrogen, phosphorus, potassium absorption ratio of 1: 0.4:1.
Third, the selection of varieties Not all sweet potato varieties stems and leaves can be eaten, and some varieties of food taste bitter, poor palatability. Appropriate edible varieties should have the following characteristics: tender young leaves tender, good palatability, bright color, no hair, axillary buds strong ability to regenerate, vigorous plant growth, high stem and leaf yield. At present, Jingshu 4 Lushu 7 and other varieties are more suitable for leaf use.
IV. Breeding methods There are two kinds of breeding methods. Cutting propagation is the main method. From the plants, strong stems are cut. Each section is about 15 centimeters long, with 3 to 4 sections, and the base is cut into horseshoe-shaped. Fuhuang fulvic acid soaked for 10 to 20 minutes, is conducive to rooting and inhibition of bacteria, and then cuttings in the sandy loam seedbed, the ground temperature 16 ~ 23 °C, temperature 20 ~ 28 °C, about 30 days after rooting survival transplant planting. Seed-bearing seedlings can also be used, but the work-product propagation coefficient is also low.
V. Site Preparation Planting in the open and protected areas with good drainage and irrigation conditions, apply 3,000 kg of organic fertilizer under culling per 667m2, deep plowing, and dosing with soil to make it 1.3 meters wide and 6 to 8 meters long. The flat. Two rows of each row were planted on the shelf, with an average row spacing of 65 cm and a spacing of 20 cm; each row was planted with 4 to 5 rows, with a plant spacing of 20 cm, and 2 11,000 plants per 667 meters. Select sunny planting, watering after planting.
Six, field management
1. After cultivating loose soil in the cultivator, the cultivator loosens the soil twice and the depth is 4 to 5 cm. The combination removes the weeds.
2, watering seedlings cultivating seedlings after 15 days or so, to promote root growth, after every 10 days or so poured, often soil moisture, should not be poured water. Drain the water immediately after the summer rain.
3, top dressing after the seedlings every 667 meters 2 points Shi special activity of chicken manure 200 kg, during the harvest every 15 days fertilization 1 time, every 667 meters 2 Shi Shi a special brand of active chicken manure 100 kg or nitrogen, Phosphorus, potassium ternary compound fertilizer 15 kg, can be combined with watering. Spray 0, 2% potassium dihydrogen phosphate once every 7 to 10 days and spray 3 to 5 times.
4. Hanging vines When the plant is up to 25 centimeters or more, use a plastic rope to cover the lower part of the plant to fix the plant, and then grow it in time with the growth. Bamboo scaffolding can also be used to allow plants to grow upright and make full use of space.
7. Harvest When the plants reach 40 cm in height, the shoots and young leaves can be harvested one after another, bundled or boxed for sale, generally harvested for about 7 days, and the harvest period can reach more than 6 months. 667 Rice 2 produces 3000 to 4000 kg.
Eighth, nutritional value and health care function Each 100 grams of edible portion contains 4.8 grams of protein, 0.7 grams of fat, 170 mg of calcium, 47 mg of phosphorus, 3.9 mg of iron, 6.7 mg of vitamin A, 503 mg of potassium, sodium 19.6 mg, 61.6 mg of magnesium, 0.4 mg of copper, 0.3 mg of zinc, 1.19 mg of manganese, 0.83 mg of cesium, ranking first in 14 kinds of vegetables such as cucumber, eggplant, tomato, and spinach .
Changshou Cai has the functions of regulating immunity, can improve the body's resistance to disease, delay aging, increase blood platelet, stop bleeding, anti-cancer, lowering blood sugar, laxative, diuresis, lactation, detoxification, prevention and treatment of night blindness and other health functions.
Usage: 1 salad. Wash with water after the first boiled, cut garlic, salt, MSG, sesame oil and other seasoning salad, very delicious; 2 fried food. After the oil and water, with sea cucumber, mushrooms and other spices rush fire stir fry; 3 for stuffing. After the boiling water, chopped and chopped to make soft and tender filling; 4 for soup. After boiling water, add sea glutinous rice or eggs as soup. The taste is smooth and tender, and the taste is fresh.
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