(1) The depth of the bottom fertilizer can reach 25 cm or more and is easily absorbed by the roots of the crop, thereby improving the utilization rate of the fertilizer. At the same time, after the deep application of the farmyard fertilizer, it can be decomposed in the deep layer of the soil, and activate the deep soil microorganisms, which is obvious to the improved soil. effect.
(2) The autumn base fertilizer is beneficial to protect the soil moisture. After the autumn fertilizer is applied, the soil porosity is increased, the water holding capacity in the field is increased, and the winter and spring preservation effect is good.
(3) It is conducive to the preservation of seedlings. Because of the application of fertilizer in autumn, most of the chemical fertilizers are turned into the deep and middle layers of the soil. The amount of surface chemical fertilizer is reduced correspondingly during spring sowing, the concentration of chemical fertilizer around the seeds is reduced, and the seed emergence rate is increased, which is beneficial to preserve seedlings. .
(4) Enhance the lodging resistance of crops, the root development of crops has a strong fertility, and the combination of deep base fertilizer in autumn and shallow base fertilizer before spring sowing makes the fertilizer evenly distributed in the middle and lower layers of the soil, which is beneficial to the vertical and horizontal crops. stretch. The root system is developed, the water absorption and fertilizer absorption capacity is strong, the crop resistance to lodging and drought resistance is significantly enhanced, and at the same time, the early defermentation and premature aging of the crop is effectively prevented, and the effect of increasing yield and income is significant.
(5) Alleviate the time of the farm, use the deep-rooted fertilizer in the autumn, and relieve the labor shortage in the spring.
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NVR has different product forms. Although its core function is the capture, storage, management and forwarding of network video streams, different companies have different designs to complete these functions and have their own characteristics. There are mainly three types of NVR products.
The first is the PC server based NVR software product (Software Only), that is, the manufacturer provides the NVR software plus license mode, which can be installed on any standard PC or server that meets the requirements.
The second is the NVR overall solution of software and hardware integration provided by the manufacturer, that is, the manufacturer installs the NVR software on its customized PC server, which is the so-called Turnkey Solution product.
The third is embedded NVR products, namely embedded devices based on embedded hardware platforms and operating systems; In addition, there are storage management integrated devices developed by storage device manufacturers, which are not the mainstream NVR form.
In terms of stability, although the reliability of PC based NVR system is not as high as that of embedded NVR system, compared with PC based DVR system, the PC based NVR system has relatively simple functions, fewer failure links and better stability than PC based DVR system.
In terms of scalability, as the PC based NVR system is based on the general PC platform and the general operating system, its hardware interface is universal, open and standardized, which is easy to be compatible with other hardware, and software development is also relatively convenient. However, due to the high hardware integration, single interface, poor compatibility with other hardware, and weak incidental functions of embedded software, the secondary development of embedded NVR is relatively complicated.
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