Cabbage is leafy vegetables, called cabbage cabbage, is a cruciferous plant, it is delicious, nutrient value is high, its storage performance is good, the use of post-production transportation. Therefore, it is a season of "eat half a year" vegetables. It is of great significance to adjust the off season of vegetables and meet the daily needs of people.
Fertility and nutritional properties
The Chinese cabbage has experienced three stages of seedling stage, rosette stage, and fruiting stage (envelopment period). The Chinese cabbage has extremely large foliage, but its root distribution is shallow and requires fertile soil. Like other leafy vegetables, Chinese cabbage is a hi-fly crop by increasing the number of leaves and leaf area to increase yield. According to the research, for every 1000kg fresh cabbage produced by Chinese cabbage, nitrogen (N) 2.24kg, forest (P2O5) 0.65kg, and potassium (K2O) 3.15kg are needed to be absorbed, and the N, P and K nutrient absorption ratio is 1:0.29:1.41. The differences in nutrient uptake of N, P, and K at different growth stages of Chinese cabbage were significant. The absorption at seedling stage was very low, rosette stage rose sharply, and the fruiting period reached a peak.
In the seedling stage, about 30 days from the sowing date, the biomass accounted for only 3.1% to 5.4% of the total biomass, and the nutrient uptake of nitrogen, phosphorus, and potassium accounted for only 5.1% of the total amount absorbed in the whole growth period. %, 3.2%-5.3%, 5.6%-7.0%. In the rosette period, growth accelerated significantly within 19 days from the 31-50 days of sowing. During this time, biomass accounted for 29.2%-39.5% of the total biological output. The amount of nutrients absorbed by nitrogen, phosphorus, and potassium accounted for the entire amount. The total absorption period of the growth period was 27.5%-40.1%, 29.1%-45.0%, and 34.6%-54.0%.
From the balding period to the middle period, about 50-69 days of sowing, a total of 19 days, the biomass has increased more, accounting for 44.4%-56.4% of the total biomass. The weight gain during this period is a critical period that determines the level of yield and the quality of Chinese cabbage. The amount of nitrogen, phosphorus, and potassium nutrients absorbed by each month accounted for 30%-50% and 32%-51% of the total absorption during the whole growth period.
In the late harvest period, only 19 days from the sowing of 69-88 days, the biological growth rate decreased, and the nutrient absorption also decreased. At this stage, the newly added biomass accounts for about 10%-15% of the total biomass, and the absorbed nitrogen, phosphorus, and potassium nutrients account for 11%-26%, 16%-245 of the total fertility absorption, respectively. About 5.0%. This shows that the period when Chinese cabbage needs the highest amount of fertilizer is from the rosette stage to the middle of Baoxin, which accounts for about 80% of the total nutrient absorption.
Cabbage fertilize base fertilizer and top dressing.
Basal fertilizers (also known as base fertilizers) should be dominated by organic fertilizers with appropriate quantified fertilizers. Fertilizer can be applied with single fertilizer and compound fertilizer, such as application of single fertilizer, generally mu application of urea 15kg, 15kg of diammonium phosphate (or superphosphate 50kg), potassium sulphate (or potassium chloride) 15kg; or nutrient content of 15-15- 15 compound fertilizer, 35-45kg per mu.
After top dressing 2-3 times, it is necessary to grasp the principle of “before light and heavyâ€. Each topdressing in the early stage of Rosette, apply 10-15kg urea per mu, potassium chloride 5-10kg. Into the ball stage (heart period) is now a period of rapid growth of cabbage, need to give a sufficient supply of nutrients, generally can use high nitrogen, phosphorus, high potassium, low phosphorus compound fertilizer, about 50kg per acre, split ball Two applications in the initial and middle period. Chinese cabbage is a kind of hi-calcium crop. Calcium deficiency can cause dry heart disease and seriously affect the quality of Chinese cabbage. However, soil calcium application is often not good, should take the leaf surface supplement, can be used 0.3% -0.5% calcium chloride or calcium nitrate spray, once every 7 days, continuous 2-3 times can be effective. Because of the poor mobility of calcium in the body, the addition of indole acetic acid (NAA) can improve calcium absorption when calcium is sprayed.
Chinese cabbage is also a crop that requires more boron, and boron-deficient soil should be treated with boron fertilizer. Boron fertilizer can be used as a base fertilizer, applying 1kg of borax per acre, mixed with other fertilizers, and applied to the soil. Or in the rosette period to the ball stage with 0.1% -0.2% of the borax solution spray, every 6-7 days spray once, Rosette 2 times, the effect is good.
Fertility and nutritional properties
The Chinese cabbage has experienced three stages of seedling stage, rosette stage, and fruiting stage (envelopment period). The Chinese cabbage has extremely large foliage, but its root distribution is shallow and requires fertile soil. Like other leafy vegetables, Chinese cabbage is a hi-fly crop by increasing the number of leaves and leaf area to increase yield. According to the research, for every 1000kg fresh cabbage produced by Chinese cabbage, nitrogen (N) 2.24kg, forest (P2O5) 0.65kg, and potassium (K2O) 3.15kg are needed to be absorbed, and the N, P and K nutrient absorption ratio is 1:0.29:1.41. The differences in nutrient uptake of N, P, and K at different growth stages of Chinese cabbage were significant. The absorption at seedling stage was very low, rosette stage rose sharply, and the fruiting period reached a peak.
In the seedling stage, about 30 days from the sowing date, the biomass accounted for only 3.1% to 5.4% of the total biomass, and the nutrient uptake of nitrogen, phosphorus, and potassium accounted for only 5.1% of the total amount absorbed in the whole growth period. %, 3.2%-5.3%, 5.6%-7.0%. In the rosette period, growth accelerated significantly within 19 days from the 31-50 days of sowing. During this time, biomass accounted for 29.2%-39.5% of the total biological output. The amount of nutrients absorbed by nitrogen, phosphorus, and potassium accounted for the entire amount. The total absorption period of the growth period was 27.5%-40.1%, 29.1%-45.0%, and 34.6%-54.0%.
From the balding period to the middle period, about 50-69 days of sowing, a total of 19 days, the biomass has increased more, accounting for 44.4%-56.4% of the total biomass. The weight gain during this period is a critical period that determines the level of yield and the quality of Chinese cabbage. The amount of nitrogen, phosphorus, and potassium nutrients absorbed by each month accounted for 30%-50% and 32%-51% of the total absorption during the whole growth period.
In the late harvest period, only 19 days from the sowing of 69-88 days, the biological growth rate decreased, and the nutrient absorption also decreased. At this stage, the newly added biomass accounts for about 10%-15% of the total biomass, and the absorbed nitrogen, phosphorus, and potassium nutrients account for 11%-26%, 16%-245 of the total fertility absorption, respectively. About 5.0%. This shows that the period when Chinese cabbage needs the highest amount of fertilizer is from the rosette stage to the middle of Baoxin, which accounts for about 80% of the total nutrient absorption.
Cabbage fertilize base fertilizer and top dressing.
Basal fertilizers (also known as base fertilizers) should be dominated by organic fertilizers with appropriate quantified fertilizers. Fertilizer can be applied with single fertilizer and compound fertilizer, such as application of single fertilizer, generally mu application of urea 15kg, 15kg of diammonium phosphate (or superphosphate 50kg), potassium sulphate (or potassium chloride) 15kg; or nutrient content of 15-15- 15 compound fertilizer, 35-45kg per mu.
After top dressing 2-3 times, it is necessary to grasp the principle of “before light and heavyâ€. Each topdressing in the early stage of Rosette, apply 10-15kg urea per mu, potassium chloride 5-10kg. Into the ball stage (heart period) is now a period of rapid growth of cabbage, need to give a sufficient supply of nutrients, generally can use high nitrogen, phosphorus, high potassium, low phosphorus compound fertilizer, about 50kg per acre, split ball Two applications in the initial and middle period. Chinese cabbage is a kind of hi-calcium crop. Calcium deficiency can cause dry heart disease and seriously affect the quality of Chinese cabbage. However, soil calcium application is often not good, should take the leaf surface supplement, can be used 0.3% -0.5% calcium chloride or calcium nitrate spray, once every 7 days, continuous 2-3 times can be effective. Because of the poor mobility of calcium in the body, the addition of indole acetic acid (NAA) can improve calcium absorption when calcium is sprayed.
Chinese cabbage is also a crop that requires more boron, and boron-deficient soil should be treated with boron fertilizer. Boron fertilizer can be used as a base fertilizer, applying 1kg of borax per acre, mixed with other fertilizers, and applied to the soil. Or in the rosette period to the ball stage with 0.1% -0.2% of the borax solution spray, every 6-7 days spray once, Rosette 2 times, the effect is good.
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