Past bio-fertilizer is only an auxiliary fertilizer. It does not itself contain the nutrients needed for crop growth, but through the life activities of its own micro-organisms, it improves the nutrient conditions of the crop, such as the fixation of nitrogen in the air, and participates in the conversion of nutrients. Promote the absorption of nutrients by crops, secrete various hormones to stimulate the development of crop roots, and suppress the activities of harmful microorganisms, so as to achieve the purpose of promoting crop growth. The current development of biological fertilizers is not only an auxiliary fertilizer, but also can provide various nutrients for crops, such as biological micro-fertilizers obtained by compounding (mixing) specific species or strains of living microorganisms with trace elements.
There are many kinds of biofertilizers, which are classified into bacterial fertilizers, actinomycete fertilizers (such as antibiotics), fungal fertilizers (such as mycorrhizal fungi), and nitrogen-fixing cyanobacterial fertilizers according to the specific microorganisms in their products. According to their different roles, biological fertilizers can be divided into five categories:
First, there is a nitrogen-fixing fungus fertilizer. Including rhizobia fertilizers, nitrogen-fixing bacteria fertilizers, and nitrogen-fixing cyanobacteria.
Second, decomposition of soil organic manure fertilizer. Including organic phosphorus bacterial fertilizer and compound bacterial fertilizer.
Third, decomposition of insoluble mineral fertilizers in the soil. Including silicate bacterial fertilizer, inorganic phosphorus bacteria fertilizer.
Fourth, to promote the utilization of crop nutrients on soil nutrients. Including mycorrhizal fertilizers.
Fifth, disease resistance and stimulate the growth of crop bacteria. Including antibacterial fertilizer, increasing production of bacteria such as fertilizer.
Lewin double arms medical pendants surgeon's pendant will support all medical equipment such as monitors,camera,power tools and video and etc,can position all the equipment conveniently adjacent to the surgical site. Medical pendants provide medical gas,electrical and data services.For the pendants, customer can customize arm length.All kinds of terminal such as medical gas, electricity and network are gathered on the control board. Some medical machines of certain weight can be placed in the board and drawer.
Double Arm Electric Surgical Pendant
Double Arm Electric Surgical Pendant,Electric Anesthesia Pendant,Electric Hospital Pendant,Electric Medical Gas Pendant
Shandong Lewin Medical Equipment Co., Ltd. , https://www.operatinglight.nl