T/NAASS 066-2023 The technical regulations for mechanical topdressing of Ningxia wolfberry roots

Scope

Scope: 1 Scope This document specifies the terms and definitions, as well as the key technical points, of the mechanical fertilization techniques for the rhizosphere of Ningxia wolfberry roots. This document is applicable to Ningxia wolfberry production areas. Main Technical Content: 3 Terms and Definitions The following terms and definitions are applicable to this document. Rhizosphere refers to the micro-area within a few millimeters of the root axis surface, where soil, roots, and microorganisms interact. Mechanical fertilization techniques involve applying fertilizer solution to the rhizosphere of crops during their growth using agricultural machinery. 4 Rhizosphere Mechanical Fertilization Techniques 4.1 Selection and Use of Rhizosphere Mechanical Fertilization Equipment The rhizosphere fertilization machinery for wolfberry consists of a frame, a fertilizer tank, a fertilizer pump, and a dual-side fertilizer application device, as well as a hydraulic system. The prepared fertilizer solution is poured into the fertilizer tank, and after being transported to the dual-side fertilizer application device by the hydraulic system, it enters the lower rhizosphere area under the wolfberry crown. A tractor with a power of more than 60 horsepower is selected as the tractor, with a walking speed of 1.7 km/h and a fertilizer tank capacity of 1,500–2,000 L, with a flow rate of 56 L/min. The trenching is performed using a rod-scale plow, with a plowing depth of 15–20 cm. 4.2 Mechanical Fertilization 4.2.1 Fertilizer Preparation Fertilizers are selected in accordance with the relevant provisions of NY/T 394-2013, NY/T 496-2010, and DB64/T 1086-2015. Irrigation water is in accordance with GB 5084-2005. For every 100 L of water, prepare 2.5 kg of ammonium phosphate, 1.7 kg of potassium sulfate, and 10.7 kg of humic acid, as well as 2.7 kg of urea. First, dissolve the urea fully in water, then add it to the fertilizer tank, and prepare 1,500 L

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