37results about How to "The method is simple and scientific" patented technology

The invention relates to the technical field of agricultural production and in particular relates to a flue-cured tobacco maturity field investigation and quantitative forecast method for determiningsuitable harvesting period of tobacco. The method comprises the following steps: dividing a tobacco field into at least one type; dividing at least one representative monitoring field piece in each ofthe types of the tobacco field; selecting at least one representative sampling point in each representative monitoring field piece; selecting 8-12 tobacco plants as investigation plants at each representative sampling point, and performing tobacco maturity investigation, wherein the maturity investigation comprises counting mature leaves of each investigated tobacco plant and counting suitable harvesting tobacco amount of all tobacco plants in each type of the tobacco field in each baking round when green color of the tobacco starts to fade in the first round and before the tobacco is mature;and comparing the suitable harvesting tobacco amount with single one-baking suitable tobacco filling amount. According to the method, the quantity of mature tobacco leaves in the field can be accurately mastered, each batch of the mature tobacco leaves can be appropriately harvested at the right time, and the problem that mature tobacco harvesting is difficultly realized is solved immediately. Therefore, the tobacco production is specialized and accurate.

The invention discloses a sodium alginate-based pH-responsive drug microcapsule, which comprises the following components in parts by weight: 8-12 parts of a hydrophobic vinyl monomer, 0.6-1 part of a cross-linking agent containing a double bond, and a hydrophobic drug 1-2 parts, 3-5 parts of sodium alginate monomer, 0.06-0.1 parts of hydrophilic surfactant, 0.3-0.5 parts of initiator, 20-30 parts of oil-soluble drug solvent and 338-563 parts of water. The preparation method includes: a) weighing each component; b) dissolving hydrophobic vinyl monomer, double bond-containing cross-linking agent and drug in an oil-soluble drug solvent to obtain an oil phase; c) dissolving sodium alginate 1. The surfactant is dissolved in water to obtain a water phase; d) Add the oil phase to the water phase and emulsify to obtain an oil / water emulsion; e) After the oil / water emulsion is heated up, add an aqueous solution of the initiator dropwise, and after the reaction, centrifuge , washing and drying to obtain microcapsules. The preparation method provided by the invention is simple, easy to operate and has good reproducibility, and the prepared microcapsules have small particle size, uniform distribution, high encapsulation rate, good wall material mechanical properties and stable drug release performance.

The invention relates to a method for seedling culturing with soil and transplanting without soil of cotton, which belongs to the technical field of cotton breeding. After being fully mixed, cotton seeds and rooting agent are planted into a the groove of a seedbed; two layers of ground film are used to cover the seedbed with the seeds sowed in; cotton seedlings are transplanted without soil aftera leaf and a core to five leaves and a core grow; the cotton seedlings after being transplanted are not restricted by the space in plastic pots for seedling culturing without soil and nutrition troughs for seedling culturing with soil, the volume of the nutrient soil occupied by the roots is large, water and fertilizer are adequate, plus the medicinal effect of nutrient liquid, the cotton seedlings are stronger than those cultured through matrix or nutrition trough seedling culturing method; after transplanting, the rejuvenation period is short, the growth recovery is fast and the survival rate is high. The method solves the problems that the labor required for nutrition trough seedling culturing and transplanting is heavy, the labor intensity is high, the seedbed management is complicated, the roots in seedling culturing without soil and transplanting are easy to be injured and the growth recovery of the roots is slow after transplanting. The method has low labor intensity in seedling culturing and transplanting with the seedbed easy to be managed, can culture seedlings in front of and behind houses, in the field or on the land, and is in particular applicable in household seedling culturing of farmers.