Scientific Cultivation Technology of Water Spinach

Asparagus itself is a kind of mature vegetable in summer, which can be eaten until the end of autumn. However, with the development of greenhouse technology, asparagus can be eaten all the year round. of course, the demand for asparagus in the market is the key factor causing this phenomenon, and the increase in the number of growers is also an important factor to make it active in the market.

Scientific planting technology of asparagus

First, sowing and raising seedlings: implement vines to raise seedlings, use the vines selected last year to protect the safe overwintering and then insert them into the seedling box. Make the whole field according to the specification of 1.5 meters in width and 20 centimeters in width, apply sufficient bottom fertilizer, sow seeds in a full box, sowing all kinds of vines 150 kilograms per mu of seedling bed. After sowing, cover with plastic plastic film for heat preservation and moisturization, and remove the plastic film after the seedlings are unearthed. When the seedling is about 30 cm high, it grabs the vine to promote the adventitious roots downward, draw long lateral branches upward, and then plant them with side branch cuttings of a certain size.

Second, fertilization and transplanting: asparagus is not strict on soil conditions, so it is appropriate to choose low-lying, moist and fertile clay soil for cultivation. The base fertilizer is mainly organic fertilizer and phosphate fertilizer, which can be sprinkled with a certain amount of plant ash. The cultivation specification is 30cm between rows and 1520cm between nests. In addition, the tip of about 15 cm can be cut and propagated again during the growth period. As long as the soil moisture in the cutting field is suitable, the shoot will quickly grow adventitious roots and pull out new shoots.

Third, field management: in the early stage, the soil should be ploughed and loosened in time to improve the ground temperature. Plant growth period, fertilizer and water demand is large, it is necessary to frequently watering, watering (dry air, insufficient soil moisture, easy to lead to the increase of hollow cabbage fiber, affecting yield and quality), and combined with watering for topdressing. After the first harvest, 15 kg of urea or 20 kg of diammonium phosphate was applied per mu, and topdressing was applied with irrigation. After that, topdressing fertilizer was applied every 20 days or so, and urea was applied 3 to 5 kilograms per mu. When the temperature turns cool in autumn, it is necessary to plough and weed in time, and pay attention to the control of red spiders and other pests. In addition, the branches should be thinned when there are too many lateral branches and the branches are crowded and thin, so that the growth of the branches is balanced, the ventilation and light transmission is good, and the product quality is improved.

Fourth, harvesting technology: timely harvest is the key to high yield and high quality of asparagus. In production, it can be harvested when the seedling height is about 25cm and 35cm. In the first and second harvest, there should be 2-3 nodes at the base of the stem to facilitate the germination of new buds, promote lateral branches and strive for high yield. After harvesting for 3 or 4 times, the plant should be reharvested, that is, only 1 or 2 books should be left at the base of the stem to prevent the occurrence of too many lateral branches, resulting in weak and slow growth.

Planting time of asparagus

Asparagus is usually planted from April to July every year and likes sufficient light, but it also has strong adaptability to close planting and loose requirements on soil conditions, but because it likes fertilizer and water, it is still better for the soil with relatively viscous weight and strong water and fertility conservation. Leaf tips grow a large number and rapidly, requiring large amount of fertilizer, strong fertilizer tolerance and high demand for nitrogen fertilizer.

Planting conditions of asparagus

1. Temperature: hollow cabbage likes warm and cold, the optimum temperature for seed germination is 20-35`C, the suitable temperature for stem and leaf growth is 25-30 ℃, the growth is slow below 15 ℃, the growth stops below 10 ℃, it is not resistant to frost, the stem and leaf die in case of frost, it can withstand the high temperature of 35-40 ℃, it still grows vigorously in hot season in midsummer, and can be planted in spring, summer and autumn in areas with long frost-free period and high temperature.

2. Humidity "asparagus likes water, grows well under high air humidity and soil moisture, grows slowly under the condition of high temperature and early drying, and decreases its quality and yield.

3. Illumination: asparagus is a short-day plant, which blossoms and bears fruit under the condition of short-day light. The seedlings like sufficient light, but when the light is insufficient, the seedlings are weak and easy to grow.

4. Soil: asparagus can be cropped continuously and like fertile soil rich in organic matter. With the rapid growth of plant leaves and shoots, the demand for fertilizer is higher. The absorption ratio of nitrogen, phosphorus and potassium was 3:1:5 in seedling stage, and 4:1:8 in the later stage of growth (at harvest). Therefore, topdressing should be balanced and nitrogen fertilizer should be applied appropriately.

The yield per mu of asparagus

The conventional cultivation of rattan vegetables is generally "autumn propagation, winter storage, spring planting, summer harvest", and the benefit is low. The out-of-season cultivation of rattan vegetables, that is, warm cellar cultivation in winter, can make rattan vegetables begin to be harvested and listed every year during the Spring Festival, 4 months earlier than conventional cultivation, and can be harvested until the end of November. It not only enriches the supply of fresh vegetables in the market, but also makes use of the seasonal price difference to obtain high benefits. Rattan vegetables warm cellar anti-season cultivation generally yield 3000~3500kg per mu, the output value per mu is as high as 6000 yuan.

Of course, the yield per mu of asparagus can not stop people's wisdom. In the Luojiagang River in Jiaochuan Street, vegetable farmer Yan Guangfu's experiment in growing asparagus in the river has been successful. Compared with soil culture, the yield of hydroponic is not inferior. "May-October is the peak season. When the weather is hot, you can mature and pick one round in a week, and the average yield per mu can reach more than 8000 jin a year."

In addition to planting hollow vegetables for their own consumption, the ultimate goal is to enter the market and make profits. Generally speaking, the per mu yield of planting hollow vegetables is still very good, but the specific profit also depends on the market situation of hollow vegetables. Therefore, the market is also very important for growers.