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2001,11
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Pedosphere
2001,11
(1)
Nutrient Balance in Relation to High Yield and Good quality of Potato on an Acid Purple Soil in Chongqing, China
作 者：
HE TIANXIU;WU DEYI;HE CHENGHUI
单 位：
关键词：
acid purple soil;nutrient balance;potato
摘 要：
A field experiment was carried out to study nutrient balance amongN, P, K and Mg in potato cultivation on an acid purple soil inChongqing, China. The experiment included 8 treatments with equal Prate of 120 kg P_2O_5 hm~-2: N_oK_2, N_1K_2, N_2K_2, N_3K_2, N_3K_0,N_2K_1, N_2K_1, N_2K_1Mg and N_2K_3, where N_0, N_1, N_2 and N_3stand for the N rates of 0, 75, 150 and 225 kg N hm~-2, and K_0, K_1,K_2 and K_3 for the K rates of 0, 165, 330 and 495 kg K_O hm~-2,respectively. Among the treatments designed, Treatment N_2K_2 with anutrient supply ratio of N; P_2O_5:K_2O: MgO = 1.25:1:2.75:0.28 gavethe highest tuber yield and dry matter, highest starch and Zn andlowest No~_3 contents in tuber, and high N, P and K use efficiencywith an uptake ratio of N: P: K: Mg=11.38:1:13:32:0.33 by tuber.
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