Effects of fertilization treatments on nutrient contents available in soil of greenhouse vineyard
ZHANG Xingguo1, HU Xiaotao1*, RAN Hui1, DU Bin1, HAO Zhe2, GONG Junwu3
1.Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, China; 2.Agriculture and Reclamation Technical Service Station of Yulin City, Yulin, Shaanxi 719000, China; 3.Yuhe Farm of Yulin City, Yulin, Shaanxi 719000, China
In order to study effects of fertilization treatment on nutrient contents available in soil of greenhouse vineyard, a field experiment was carried out on "6-12" precocious grape in the wind-sand area of northern Shaanxi. The traditional fertilization was as a control, while drip irrigation fertilization treatments were designed, including three fertilization levels such as T1(930 kg/hm2), T2(840 kg/hm2), and T3(750 kg/hm2)at the same drip irrigation quota. The results showed that the effects of fertilization treatment on nutrient content available in the soil of greenhouse vineyard in different growth periods had statistical significance. During the shoot growth period, the nitrogen content available in 0-50 cm soil layer in T2 is the highest, which is favorable to the vegetative growth of grape plants in this period. In the fruit enlargement and coloring maturity periods, the phosphorus and potassium contents available in 0-50 cm soil layer are the highest in T2, which has a significant effect on promoting grape yield and quality. In summary, the fertilization T2 in drip irrigation is a suitable fertilization method to greenhouse grape cultivation in this region. In addition, the traditional fertigation method of "big flood and big fertilizer" can lead to even more loss of fertilizer efficiency, but also nutrient migration to deeper soils, pollution of groundwater, and destruction of the ecological environment.
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