TITLE:
Response of Nutrients in Apple Leaves to Regulation of Water and Fertilizers in Loess Hilly Area
AUTHORS:
Lei Hua, Jianen Gao, Meifang Zhou, Zhe Gao, Tingwu Lin
KEYWORDS:
Regulation of Water and Fertilizer, Mountain Apple, Leaf Nutrient
JOURNAL NAME:
Open Journal of Soil Science,
Vol.8 No.4,
April
30,
2018
ABSTRACT: Aiming at the problem of the low utilization ratio of water resource and fertilizers in apple orchard in loess hilly area, which is the result of both water shortage and improper fertilization, a field experiment of the regulation of water and fertilizers is carried out in a typical apple orchard in this area to make analysis of nutrients in apple leaves under different treatments of water and fertilizers. The results show that: in the experimental area: 1) the total nitrogen content in apple leaves maintains at a low level of 1.87% - 3.17%; the total phosphorus content in apple leaves maintains at a low or normal level of 0.13% - 0.16%; and the total potassium content in apple leaves maintains at a deficient level of 0.46% - 0.64%; 2) the regulation of water and fertilizers has some effect on promoting the trees to adsorb both the total nitrogen and the total potassium, but it has no apparent effect on promoting the leaves to adsorb the total phosphorus. In the management of water and fertilizers in this apple orchard, the effects of the water and the fertilizers should be properly regulated to make full use of the limited water resource and improve the utilization ratio of the fertilizers as well, so as to achieve the three goals of saving water, saving fertilizers and improving quality.