Study On Pattern And Fertilization Effect Of The Growth Of Nursery Seedlings Of Hippophae Rhamnoide

Hippophae rhamnoide is a favored species for its advanced characteristics in economy, soil-water conservation, and ecological function, and the market demand is increasing. Experienced and commercial breeding technology of shoot cottage can meet the demand to some extent, but its quality standard has not come into being, and counts against standardized seedling production. We studied the pattern of seedling growth and fertilizing effects in order to determine the optimizing time and amount of fertilization. This work would provide fertilization principles for future large production of high quality Hippophae rhamnoide seedlings.Hippophae rhamnoide seedlings of 5 months were used in cottage, and their annual growth in height was observed. Seedling growth course was segmented by using ordered cluster analysis. Orthogonal regression was used to analyses the shoot height and base diameter responses to nitrogen, phosphor, and potassium of different proportioning. We found that the shoot growth of Hippophae rhamnoide is conformed to the"S"increase, and significantly affected by the proportion variation among nitrogen, phosphor, and potassium.Detailed analysis came to the following six conclusions:1. The seedling height growth of Hippophae rhamnoide had a rhythm of slow-fast-slow, i.e., one peak in a year. The fast period is a critical point for shoot production management.2. The seedling height growth of Hippophae rhamnoide has significant variation among different months. The 62.2% height increase was achieved between June and August, which also the critical time for water-nutrient managements.3. The growth of cottage seedling of Hippophae rhamnoide was promoted by N, P, and K but with different strength and patterns. For height, the effect of N﹥P﹥K, while for basal diameter, N﹥K﹥P on the same original soil conditions.4.The height growth of seedling of Hippophae rhamnoide was dramatically influenced by the cross effects of N and P, N and K, but not for P and K.5. The basal diameters of Hippophae rhamnoide seedling were increased greatly by the cross effect of N and K. 6.For the study field conditions, the optimal fertilization range for DGSJ cottage seedlings is 253.8 - 303.17 kg / hm2 for N, 153.23 - 194.57 kg / hm2 for P, and 140.13 - 144.28 kg / hm2 for K, with the height and basal diameter of 85.88cm and 7.0153 mm respectively. Shoot quality was notably increased under this treatment.