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Northwest University of Science and Technology (2006)

Balanced Fertilization Technology of Hippophae Rhamnoides L. Seedling in the Semiarid Area of Loess Plateau

Liu Du Ling

Titre : Balanced Fertilization Technology of Hippophae Rhamnoides L. Seedling in the Semiarid Area of Loess Plateau

Auteur : Liu Du Ling

Grade : Master’s Theses 2006

Université : Northwest University of Science and Technology

Résumé
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

Mots clés : Hippophae rhamnolides L. balanced fertilization fertilizing effect soil fertility fertilizer use efficiency

Présentation (Dissertation topics)

Page publiée le 6 octobre 2014, mise à jour le 20 octobre 2017