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Field requirements
According to the biological characteristics of Canna indica. It is advisable to choose gentle slopes, slopes between mountains, and valleys with high terrain, sufficient sunlight, and convenient irrigation and drainage. It requires sandy loam that is deep, loose and fertile, rich in organic matter, and neutral and acidic.[1]

Germline selection
Generally, farmers use tubers for seeding. The optimal tubers for seeding are big, with many roots and the purple-red seed bud. Generally, tubers should have 2 buds, and the mass of a single bud is 50-100 g.[2] In order to ensure the whole seedings, it is necessary to select good, fresh, full and thick tubers, free of diseases and insect pests. If the tubers are large, they can be divided into fragments, each with 2-3 buds, disinfect the wound with grass and wood ash, and then spray 75% carbendazim liquid on the seeds. After a little airing, they can be sown, but not exposed to the sun. [1]

Sowing
The best planting time for Canna indica is from February to March, and the amount of tubers is controlled at 3 000-4 500 kg/hm2. Because Canna indica has a strong ability to divide plants, if the land is fertile, the planting density should be controlled at 22,500 Plants/hm2, plant spacing is 60-70 cm, row spacing is 70-80 cm, or double-row mulching planting, or multi-row seeding. As the Canna indica plants are taller, the planting direction should be downwind as much as possible. When sowing, let the sprouts of the seeds all face upwards, and control the sowing depth at 8-10 cm. Germination begins when the soil temperature is above 16 ℃, the suitable temperature for germination is 20-25 ℃, and the seedlings emerge 20-30 days after sowing.[1]

Irrigation
High-yield and efficient cultivation of Canna indica require reasonable irrigation. If encounter heavy rain, pay attention to draining the excess water in the fields.[1]

Fertilization
Suffiicient base fertilizer is required for Canna indica. And the top dressing should be applied less in the early stage and more in the later stage because Canna indica grow slowly in the early stage and quickly in the later stage. In the early stage, seedling fertilizer is applied in combination with the first cropping soil and topdressing according to seedling conditions. Apply 50 g ternary compound fertilizer（N, P, K） for each plant, and apply 50 kg for 667 m2. When applying fertilizer, avoid direct contact between the chemical fertilizer and the base or leaves of the Canna indica. Before flowering, combine the second field cultivation with soil and topdressing the second fertilizer to promote the growth of underground stems and roots. The topdressing is mainly phosphorus and potassium fertilizer, and 667 m2 is applied with 50 kg of phosphorus fertilizer, 30 kg of potassium fertilizer or 60 kg of ternary compound fertilizer. When fertilizing, apply the fertilizer evenly on both sides of the roots to help the roots absorb water and grow in a balanced manner.[2]

Weeding
Weeds grow faster and will have negative impact on Canna indica, especially before the 4th standing leaf appears. There are two methods of cultivating weeding: ①Applying herbicides to eradicate weeds, which not only helps to improve the air permeability of the soil, but also helps to make the soil looser; ②Carry out cultivating and weeding operations irregularly.[1]

Plucking leaves
In order to ensure good light transmission and good ventilation in the field, the leaves can be picked as green fodder for livestock during the entire growth period of Canna indica. In addition, old leaves, yellow leaves, dead leaves, etc. are removed and burned together after removal.[1]

As food use in China
Canna indica was originally introduced to China as a perennial ornamental crop to my country in the 1950s. It is mainly cultivated and planted sporadically in parks and houses for ornamental purposes. From the late 1950s to the early 1960s, due to the severe shortage of food in China（Great Chinese Famine）, people searched for food in search of survival. Weeds, tree roots, plantain roots, tubers, etc. became the food to suffer from the disaster. Among these foods, Canna indica tubers can relieve hunger after being roasted and mature when eaten, and are delicious. Therefore, the edible value of Canna indica has attracted attention. Through production practices, they are processed into Canna indica starch, vermicelli, white wine, ethanol, etc., and the stems and leaves are restored. Due to the expansion of the use range of Canna indica and its tolerance to extensive cultivation and minimal pests and diseases, it has become a dominant characteristic crop for large-scale cultivation and development. It has been more than half a century since Canna indica was introduced into Guizhou from sporadic cultivation as ornamental to large-scale cultivation. The research in China mainly focuses on processing methods, and there are few studies on varieties and cultivation techniques.[3]

Biodegradable plastic materials in China
In China, there is an invention about using Canna indica starch and polyethylene as the raw materials to produce plantain plastic. And this plastic has lower cost and can degreade completely into fertilizer for crop production in just a few months without polluting the environment.

The method for producing Canna indica plastics of the present invention includes: fusing 60-80% of Canna indica starch and 20-40% of polyethylene uniformly at 240°C to obtain it.[4]