1. The difference between foreign machine-picked cotton and domestic machine-picked cotton:
1) The main producing areas of foreign machine-picked cotton are in developed countries with farm-style management such as the United States, Australia, and Brazil. There are about 7 million acres of machine-picked cotton.
Features: No foreign fibers, good maturity, good uniformity, low short staple rate, low impurity content, and good consistency.
2) Domestic machine-picked cotton is mainly produced in the Xinjiang Corps (machine-picked cotton in northern Xinjiang accounts for about 80% of local cotton, and machine-picked cotton in southern Xinjiang accounts for about 40% of local cotton); there are very few in the mainland, and there are only a few organic cotton demonstration areas. Pick cotton.
There are approximately 1.5 million acres of machine-picked cotton in China.
Characteristics: poor maturity, high lint rate, high impurity content, three filaments, and snakeskin filaments caused by the mulching film being mixed into the cotton.
2. Overview of machine-picked cotton and hand-picked cotton:
1) Machine-picked cotton:
One-time picking method
1. Advantages:
The yield is high, cotton picking is easy to manage, and the transportation is convenient. It contains less foreign fiber and the cost is lower than hand-picked cotton (it can save about 0.5 yuan to 1 yuan per kilogram).
2. Disadvantages:
Seed cotton has a high impurity content, a large number of various defects in raw cotton, a high lint rate of raw cotton (16%-20%), poor uniformity, low strength, poor maturity, a lot of dead cotton, and a long seed cotton processing process. There is a lot of noil during spinning and the yarn hairiness is large.
3. Spinning adaptability:
Generally, carded yarn and open-end spinning yarn are below 21 counts, and can reach up to 40 counts.
2) Hand picked cotton:
Layered picking method
1. Advantages:
Seed cotton has low impurity content, good raw cotton maturity, less dead cotton, low short staple rate (11%-12%), good uniformity, and relatively high yield per unit area.
2. Disadvantages:
It requires a lot of labor, high picking costs, and a lot of foreign fibers.
3. Spinning adaptability:
The spinnable count is generally 40, and can reach up to about 60.
3. Lint price calculation:
Lint price = [unit price of seed cotton per kilogram – unit price of cotton seed per kilogram * (1 – lint rate – cottonseed damage during processing)] / lint rate x 2000 + processing fee per ton
For example: the unit price of seed cotton is 3.5 yuan/jin, the unit price of cotton seeds is 1 yuan/jin, the damage consumption is 2%, the lint rate is 40%, and the processing fee is 800 yuan/ton.
Lint price = (3.5-1*58%)*2000/0.4+800
=15400 yuan/ton
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