vegetable. It is an annual or perennial trailing herb in the family of convolvulaceae, and it is fed by the young leaves of the shoots. Like
warm and humid, high temperature resistance, high and stable yield, is the summer and fall season is extremely important green leaf
vegetables. According to the leaf type is divided into two categories of large leaf type and small leaf type. According to the different flower color, there are two types of white flower species
and purple flower species. According to the planting method, there are water spinach and dry spinach. Dry water spinach varieties suitable for dryland
cultivation, strong flavor, dense texture, lower yield. Water spinach is suitable for shallow or deep water cultivation, stem and leaves
thick, crisp and tender, high yield. At present, the north is mainly dry planting, the south dry planting, water
planting are available, roughly early varieties of dry planting is dominant, in the middle and late varieties of hydroponic planting is predominant. Dry < / p >
planted commonly used varieties of water spinach, live or transplanted seedlings; hydroponics are used varieties of water spinach, stem and vine reproduction.
(1) seedling: spring, when the temperature reaches 15 ℃ began to reproduce, South China in February to March,
Southwest in March to April, the middle and lower reaches of the Yangtze River in the middle and late April seedlings. With seed sowing or stem
section cuttings can be. In order to market early, it is best to use the sun bed or shed and other heat preservation seedbed nursery. The water spinach
seed is big, every 666.7m2 seedbed needs 15~20kg of seed, can be used for 1~1.3hm2 transplanting
. Strip sowing or spot sowing, after sowing with fine soil to cover the seeds, covered with straw, and then inserted into an arch with bamboo pieces
shaped shed, covered with plastic film, after the emergence of seedlings in a timely manner to remove the straw, pay attention to ventilation, heat preservation
and irrigation, as far as possible, so that the bed temperature rose to 20 ~ 30 ℃, to promote the growth of. After about 4 weeks, the seedling height
12cm when planting. Stem cuttings propagation of seedlings, the first seed stem from the cellar, warm water soaking wet
, and then planted densely in the hotbed, so that the temperature rises to 35 ℃, after about 1 week, the buds issued and then
temperature will be reduced to 25 ~ 28 ℃. In about 20 days, when the lateral branches grow 7~10cm, then transplanted to the rice field
, every 17cm, burying a vine, so that the buds stick out of the mud. When the seedling is 20cm high, then it will be
pressed down, so that the node downward rooting, upward secondary lateral branches. After the second lateral branch grows up, from the base
part of the 2 nodes cut off as seedling, cuttings in the field. Sichuan Dukou, winter is not too cold,
Before the frost with residual fertilizer and grass to cover the old root and stem, can be safe overwintering, do not need to separate cellar. The next
year old root and stem germination, grow to 7 ~ 10cm, planted in seedbeds seedlings. Guangzhou often last year's persistent
root growth of new side shoots directly planted into the dry land.
(2) planting: dryland planting selected wet fertile place, according to the 20cm square distance live or transplant
. Shallow water planting, after the release of water at a distance of 20 ~ 25cm, the seedling stem base and root planted in the soil
, 4 ~ 5cm deep. planting shallow water, so that most of the leaves exposed to the water, to improve the soil temperature, and to promote
into the hair root. Deep-water floating planting, the seedlings will be 13~20cm distance braided into the braided gabions or thick
thick straw rope, the general rope length of 10m or so, the two ends of the set of stakes or bamboo poles, so that it can be
with the
water surface up and down and up and down floating.
(3) management and harvest: Kangkung management principle is early planting, fertilization, hard picking.
Pre-planting low temperatures, dry land should be diligent plowing, paddy fields should be put in the sun to improve the ground temperature.
Summer
Season plant growth is fast, should be often watering fertilizer, plowing and weeding, and pay attention to the prevention and control of red spiders,
aphids, cabbage moths, white rust and other pests and diseases.
Harvesting should be timely, generally when the plant height of 25~30cm when harvesting. The method is to cut from the base of the stem at 2~3
nodes, and cut at the base of the lateral branches at 1~2 nodes after the lateral branches occur, and when there are too many late stem trails, you should
remove some of the stem trails from the base. Roughly 10 days to harvest once, each harvest should be timely
fertilizer watering.