Detailed Explanation of Key Techniques for Short-Cutting Propagation of Tea Plants
I. Selection of Mother Trees and Cultivation of Cuttings: Select a vigorous, genetically uniform, pest- and disease-free garden as the mother garden, then select mother trees within the mother garden. The selected mother trees should not be plucked for tea; instead, shoots are retained for cutting propagation. Generally, spring shoots are retained for summer cuttings, and summer-autumn shoots are retained for autumn-winter cuttings. Topping should be done about 13 days before cutting the cuttings.
II. Selection and Preparation of Nursery Land: Select a site near the new plantation, with convenient transportation, loose and fertile slightly acidic red-yellow loam soil, and convenient drainage and irrigation. Plow and sun-bleach, rake level and break up clods, and remove grass roots, tree roots, debris, etc. With a bed width of 1 m, a furrow width of 50 cm, and a depth of 10--15 cm, open furrows in an east-west direction, open drainage ditches around the field, apply base fertilizer to the bed surface at 40--60 loads of decomposed barn manure and 30--50 kg of superphosphate per mu, mix evenly with the bed soil, then spread yellow or red soil on the bed surface to a thickness of 5--6 cm.
III. Selection and Cutting of Cuttings: Select current-year, pest- and disease-free, woody or semi-woody branches with plump axillary buds, yellow-green with purple, and hardened. When cutting, proceed from top to bottom, starting from a hardened node, with each cutting 3 cm, bearing one complete leaf and one plump axillary bud, with smooth upper and lower cuts parallel to the leaf growth direction. If one node is less than 3 cm, remove the next leaf and use two nodes as one cutting.
IV. Insertion Time and Method: Can be inserted in all four seasons. Hold the axillary bud leaf petiole between the thumb and index finger and insert obliquely into the soil at a 65-degree angle, with the petiole axillary bud exposed above the soil surface. Row spacing 3 cm, plant spacing such that leaves do not overlap. Water first, then build a shade frame.
V. Field Management: From insertion to new root development (generally lasting 30--90 days). Water frequently, shade carefully, maintain soil water-holding capacity at 60--70%, sprinkle water once in the morning or evening; excessive moisture prevents root development or causes root rot. From new root development to seedling height 10 cm. Apply fertilizer frequently and lightly, using 1.5--2 kg of urea per mu each time. Remove weeds or flower buds by hand, carefully loosen the soil to prevent root damage, and gradually reduce shading. From seedling height 10 cm to out-planting. Increase fertilizer application, strengthen control of pests, diseases, termites, etc., uncover the shade frame one month before out-planting to harden the seedlings, cut the top, and water thoroughly before out-planting.