Generally, in the late autumn and early winter of the first year, basal fertilizer is applied before ploughing, and decomposed manure or compost1500 ~ 2000kg, calcium superphosphate 25kg and plant ash100kg are applied every 667m. Spread it evenly on the surface, then plow it into the ground and spend the winter leisurely. Before sowing in the next year, plough and rake again to make the furrow smooth and fine, and the south is higher than Peiping. Sowing date: from mid-April to early May in North China, sowing in the north should be earlier than later, and sowing in the south should be from early March to early April due to the low temperature in the later period. Sowing method: The row spacing of the drill is 35-40cm, and a ditch with a depth of 3-4cm is opened. Seeds are evenly sown in the ditch, covered with soil1-2cm, and holes are dug with a hole spacing of 25-30cm. Each hole is sown with about 10 seeds, and covered with soil of 2cm. In the south, it is customary to apply base fertilizer to sowing ditches and holes. The seed consumption per 667m is1.5 ~ 2kg. After sowing in the north, it should be slightly suppressed, the soil should be watered, and seedlings should emerge 6 or 7 days after sowing.

Pay attention to loosening soil and weeding after emergence; When the seedling height is about 65,438+00 cm, it should be combined with intertillage weeding, and 65,438+0 ~ 2 plants should be reserved according to the plant spacing of about 25 cm for drilling, and 3 ~ 4 plants should be drilled in each hole. If seedlings are found to be missing, they should be replanted with soil in time. Before closing the ridge, combine loosening soil, weeding and cultivating soil to prevent lodging; Topdressing for 2 ~ 3 times during the growth period, the first time after the seedlings are fixed, mainly nitrogen fertilizer, and human and animal manure or urea can be applied. The second time is before flowering, which is a period of vigorous growth and a period of transition from vegetative growth to reproductive growth. Should be re-applied, can be applied to human and animal manure, can add calcium superphosphate or potassium chloride, plant ash. The third time is topdressing outside the roots at the initial stage of fruit setting, 2% calcium superphosphate or KHPO (. So as to promote fruit ripening and increase seed yield. Psoralea corylifolia is also a leguminous plant with rhizobia, which can fix nitrogen. In addition to applying less nitrogen fertilizer at seedling stage, it is not appropriate to apply more nitrogen fertilizer in the future, so as not to cause plant white growth, prolong flowering period and affect seed maturity.

Psoralea corylifolia is a raceme, the flowering sequence is from bottom to top, the fruit matures gradually from bottom to top, and the flowering period is longer. It is estimated that the flowers that bloom at the end of August and the beginning of September may not mature easily in late autumn, so it is necessary to cut off the inflorescences that have just opened at the top of these inflorescences in early September to reduce nutrient consumption and concentrate nutrients on the development, growth and enrichment of the lower seeds, so as to make the seeds mature in advance.