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1.园地选择。核桃园地应选择丘陵、山地中土层较厚、土壤疏松、排水良好的地方,以腐殖质多、pH值在6.2～8.2、地下水位较低、含钙的微碱性土为佳。生态环境需符合GB/T18407.2-2001《农产品安全质量无公害水果产地环境要求》。2.品种与砧木选择。品种选择:选择产量高、抗逆性好、早实丰产的优质品种。早实品种有:中林一号、辽宁一号、香玲、西林三号等;晚实品种有:清香,礼品1、2号,晋龙1、2号等。砧木选择:选择抗旱、抗寒、生长旺、适应性强的种类作砧木。如:共砧(一般用夹核桃)、野核桃。3.苗木培育。种子繁殖法:选用优良品种充分成熟的种子,经层积处理2～3个月后春播(在3月底至4月初播种)。穴播每穴放2～3粒(每粒间隔至少10厘米),条播行距50～60厘米,株距12～15厘米。播种深度以覆土6～8厘米为宜。直播建园时干旱地区采取深坑浅埋法,即挖坑深24～30厘米,下面挖松并施有机肥,踏实后播种,种子上面覆土9～12厘米,上面留14～16厘米深的小坑,以便积水保墒。
1. Garden selection. Walnut should choose hilly, mountainous soil thick, loose soil, well-drained place to humus and more pH value of 6.2 to 8.2, lower groundwater level, calcium-containing slightly alkaline soil is better. The ecological environment shall comply with GB / T18407.2-2001 “Environmental Quality Requirements for Producing Environment-Friendly Fruits of Agricultural Products”. 2 varieties and rootstock selection. Variety selection: Select high yield, good resistance, early high-yielding varieties of high quality. Early varieties are: Zhonglin One, Liaoning One, Hong Ling, Xilin III, etc .; late real varieties are: fragrance, gifts 1,2, Jinlong 1,2 and so on. Rootstock choice: Choose drought, cold, growth, adaptability of the species as rootstocks. Such as: a total anvil (usually with walnut), wild walnut. Seedling cultivation. Seed propagation method: Select the full varieties of mature seeds, the stratification of 2 to 3 months after spring sowing (in late March to early April sowing). Hole-punched 2 to 3 per hole (each interval of at least 10 cm), spacing of 50 to 60 cm, spacing of 12 to 15 cm. Sowing depth to cover 6 to 8 cm is appropriate. Direct broadcast construction of arid areas to take shallow pit shallow burial method, that pits 24 to 30 cm deep, the following dug loose and organic fertilizer, practical planting, covering 9 to 12 cm above the seed, leaving 14 to 16 cm deep Pit, so water moisture.