What is a portable paper box:
The portable carton is a commonly used packaging box, most of which are used as gift products. The portable carton is a more convenient to carry packaging box. We are also called the portable packaging box. Now more and more companies choose to Customize the portable paper box yourself, so that it is more convenient to give gifts to customers, employees, etc. during the festival, which is very practical.
Material of portable paper box:
The portable paper box is generally made of coated paper + finished corrugated paper. It is very strong in quality. Many customers will choose to use the portable paper box if their own products are heavier. One is convenient to take and the other is It is easier to carry, and the commonly used portable paper boxes are also four-color printing + dumb film. This is a more commonly used material. If customers want other effects, we will also re-recommend~
Rongdian Printing Products Co., Ltd.:
Shenzhen Rongdian Printing Products Co., Ltd. is located at 303, 3rd Floor, Building 2, Potoudu Industrial Zone, Longxi Village, Longcheng Street, Longgang District, Shenzhen, Guangdong Province, China. It mainly deals in various printing products: stickers, product color boxes, exquisite gift boxes, picture albums , Promotional color pages, trademark tags, envelope receipts! Shenzhen Rongdian Printing Products Co., Ltd. adheres to the production philosophy of "printing every product with heart" and strictly implements it! Looking forward to your visit~
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Once the natural forest is cultivated, the process of mineralization of soil organic matter will be intensified. As a result, the content of soil organic matter will be significantly reduced. This has become an important aspect of the degradation of red soil. From the analysis of this paper, the soil organic matter of different commercial forests has different levels of barrenness. Change. Although many commercial forests (such as forests and bamboo forests for bamboo shoots) have the habit of applying organic fertilizer during the cultivation process, due to the increase in the cost of modern labor and the weak concept of farmers in using organic fertilizers, the application is still not widespread. Soil organic matter contains other nutrients such as nitrogen, phosphorus, and potassium. Once the content of organic matter is reduced, it will cause the reduction of other nutrient storage, making the soil nutrients appear to be depleted. The use of soil nutrient fastness tester to measure the soil nutrients in commercial woodland, in order to understand the fertility of commercial forest soil, adapt to local conditions, and take effective measures to improve fertility.
Soil total potassium was the lightest in terms of soil barrenness, which accounted for 57.15% at the rich level and 9.0% at the medium level of the barren level. There was no severely barren soil, and the soil with a relatively low level of soil available potassium depletion was bamboo shoots for bamboo shoots. In comparison with the Chinese fir forest, not the fruit forest, the total nitrogen in the soil is less depleted in the fruit forest, while the hydrolytic nitrogen is not depleted in a similar manner. This shows that although the fruiting soil cultivation is frequent, but the fruit growers more, so the total soil nitrogen, phosphorus, potassium is higher, but the fruit trees of the soil nutrient consumption is large, so the soil available nutrient content is often not high.
The proportion of soil total nitrogen in the moderately barren level is the highest, reaching 44.22%, while the proportion of hydrolyzed nitrogen is the highest in the low grade, which is 47.86%. From the perspective of different forest stands, the sum of the proportions of total nitrogen and severe barrens in the soils of Chinese fir and tea gardens exceeded 50%, which was 71.43% and 53.33% respectively, and the degree of barrenness in Chinese fir forests was the most serious. It is worth mentioning that the total nitridation degree of fruit trees is not the most serious, mainly in light barren (42.86%), but the proportion of severely hydrolyzed nitrogen is highest in the 4 commercial forests, accounting for 50.00%. The sampling was conducted in early July. At this time, the peak of vegetative growth of fruit trees had already passed and entered the seat and the fruit enlargement period. As a result, a large number of nutrient growth and fruit enlargement absorbed a large amount of nitrogen in the soil, resulting in a relative lack of available nitrogen in the soil. This also reveals the importance of spring fertilization in fruit trees.
Phosphorus deficiency is a common problem in red soil. After the artificial use of red soil, especially the poor utilization of soil erosion, the degree of phosphorus depletion will further deepen. The determination of soil nutrients by the soil nutrient detector showed that the soil phosphorus was the most severely degraded in the analyzed nutrients. The average soil total phosphorus in the 4 types of commercial forests accounted for 60.00% of the average, and the medium and low levels of barrenness were moderate and low. The sum of severe poverty levels reached 73.40%. It shows that on the one hand, commercial forest management has exacerbated soil erosion, and the sum of moderate and severe poverty has reached 73.40%. On the other hand, artificially supplementing phosphorus deficiency results in a deepening of soil phosphorus depletion. From the standpoint of different commercial forests, the degree of soil total phosphorus and available phosphorus depletion are the most serious in the Chinese fir plantation, and the sum of total phosphorus and available phosphorus and medium and poor barren account for 88.10% and 88.13%, respectively; Light is the fruit forest soil, and the sum of total phosphorus and available phosphorus in the severely moderately infertile two grades accounted for 42.86% and 57.14%, respectively.
The distribution of commercial woodland is very broad in the hilly areas in the south, and the biggest difference in the so-called commercial woodland natural forests is to obtain economic benefits. In the process of cultivating commercial forests, human factors have exacerbated water and soil erosion, and the red soil, which originally has low fertility, has been further degraded. The decline of soil nutrient content has become a major aspect of soil degradation in this area. It is an urgent task for soil workers to carry out evaluation of soil quality in this area, especially evaluation of nutrient degradation. For soil nutrient analysis and determination, soil nutrient fastness tester can be used in modern times.