Balanced Fertilization Technology Of Hippophae Rhamnoides L. Seedling In The Semiarid Area Of Loess Plateau

The experiment was carried out in the semiarid area of Loess Plateau by using the Hippophae rhamnoides softwood cutting stock. The different quantity and proportion fertilizer were used in the former, middle and later period in the fast-growing period according to the orthogonal design, in order to discover the best fertilizing fabricate, quantity and ratio of N,P,K. Which have the best effect on the quality and quantity of seedling, on the maintaining the soil fertility, decreasing soil fertilizer remaining and fertilizer use efficiency is the height. By experiment, main conclusions were drawn as followings:1. In the factors of N,P,K, N is the most main factor which has significant effects on the height growth and then are P,K sequent . The fertilizer quantity of N,P,K are: N 300kg/hm²,P₂O₅ 100kg/hm²,K₂O 0 kg/hm², N:P:K =3:1:0, the height growth of seedling is the best.2. In the factors of N,P,K, P is the most main factor which has significant effects on the caliper growth and then are N,K . The fertilizer quantity of N,P,K are: N 300kg/hm²,P₂O₅ 100kg/hm²,K₂O150kg/hm². N:P:K is 3:1:1.5, the caliper growth of seedling is the best.3. In the factors of N,P,K, N is the most main factor which has significant effects on the above and under ground biomass and total biomass ,and then are P,K(under ground biomass is K,P). The fertilizer quantity of N,P,K are: N 300kg/hm²,P₂O₅ 200kg/hm²,K₂O 0kg/hm², N:P:K=3:2:0, the above-ground biomass of seedling is the biggest . The fertilizer quantity of N,P,K are: N 300kg/hm²,P₂O₅ 100kg/hm²,K₂O150kg/hm², N:P:K=3:1:1.5,the under-ground biomass of seedling is the biggest .When N 300kg/hm²,P₂O₅ 200kg/hm²,K₂O150kg/hm², N:P:K=2:1.33:1,total biomass of seedling is the biggest .4. In the factors of N,P,K,K is the most main factor which has significant effects on the ratio, and then are P,N. When N 0 kg/hm²,P₂O₅100 kg/hm²,K₂O150kg/hm², N:P :K=0:1:1.5,the root to crown ratio of seedling is the biggest .5. When N300kg/hm²,P₂O₅ 200kg/hm² ,K₂O250kg/hm², N: P: K = 1.5:1:1.25,the soil fertility is maintained, decreasing soil fertilizer remaining and fertilizer use efficiency is the height.6. In the factors of N,P,K, N is the most main factor which has significant effects to...