关键词: 土地沙漠化, 土地沙漠化, 敏感性, 地理信息系统, 黑龙江西南部

Abstract:

To promote balanced fertilization of wax gourd, field experiment was conducted in Hainan area to examine the effects of balanced fertilization with N, P, K, Mg and Zn on wax gourd yields, fruit quality, plant nutrient content and nutrient uptake by plant. The results showed that fruit yield were significantly influenced by N, K and Mg fertilizers, differently, application of P and Zn had no effect on fruit production. Yields decreased by 25.9 %, 18.6 % and 16.7 % with minus N, K or Mg treatment, respectively. Fruit qualities were favored by balanced fertilization. Minus K, P, or Zn treatment reduced soluble sugar. Balanced fertilization also increased nutrient content in plant leaves and stalks, meanwhile improved nutrient uptake by plant, and thus, the N、P2O5、K2O、MgO use efficiency was 21.53 %、8.21 %、35.50% and 20.2 %, respectively, and absorbed nutrient with 1000 kilogram fruit of wax gourd of N、P2O5、K2O、MgO were 1.40 kilogram, 0.51 kilogram, 2.49 kilogram and 0.33 kilogram. The absorption ratio of N, P, K and Mg was 1:0.36:1.78:0.24.