Nutrient Balance in Relation to High Yield and Good Quality of Potato on an Acid Purple Soil in Chongqing,China |
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引用本文: | HETIANXIU HEFUJIAN 等. Nutrient Balance in Relation to High Yield and Good Quality of Potato on an Acid Purple Soil in Chongqing,China[J]. 土壤圈, 2001, 11(1): 83-92 |
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作者姓名: | HETIANXIU HEFUJIAN 等 |
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作者单位: | [1]SouthwestAgriculturalUniversity,Chongqing410076(Chian) [2]HokkaidoUniversity,Sapporo(Japan) |
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摘 要: | A field experiment was carried out to study nutrient balance among N,P,K and Mg in potato cultivation on an acid purple soil in Chongqing,China,The experiment included 8 treatments with equal P rate of 120 kg P2O5 hm^-2 :N0K2,N1K2,NK2K2,N3K2,N2K0,N2K1,N2K1Mg and N2K3,where N0,N1,N2 and N3 stand for the N rates of 0,75,150 and 225 kg N hm^-2 ,and K0,K1,K2 and K3 for the K rates of 0,165,330 and 495kg K2O hm^-2,respectively,Among the treatments designed ,Treatment N2K2 with a nutrient suply ration of N:P2O5:K2O:MgO=1.25:1.275:0.28 gave the highest tuber yield nd dry matter ,highest starch and Zn and lowest NO3^- contents in tuber,and high N,P and K use effciency with and uptake ratio of N:P:K:Mg=11.38:1:13.32:0.33 by tuber,Yield and starch and protein contents of tuber were the lowest in Treatment N0K2.Dry matter was the highest N,P and K utilization rates .Statistical analysis showed that yields of tuber and starch were in a positive linear correlation with the uptake amount of various nutrients and protein of the potato tuber was in a significantly positive linear correlation with tuber N content and in a singificantly negative linear correlation with tuber K and Mg contents .Balaced application of N,P,K and Mg fertilizers(Treatment N2K2)was recommended for realiztion of high yield and good quality in potato cultivation.
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关 键 词: | 酸性紫色土 营养平衡 马铃薯 重庆 中国 土豆 |
Nutrient Balance in Relation to High Yield and Good Quality of Potato on an Acid Purple Soil in Chongqing,China |
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Abstract: | A field experiment was carried out to study nutrient balance among N,P,K and Mg in potato cultivation on an acid purple soil in Chongqing,China,The experiment included 8 treatments with equal P rate of 120 kg P2O5 hm^-2 :N0K2,N1K2,NK2K2,N3K2,N2K0,N2K1,N2K1Mg and N2K3,where N0,N1,N2 and N3 stand for the N rates of 0,75,150 and 225 kg N hm^-2 ,and K0,K1,K2 and K3 for the K rates of 0,165,330 and 495kg K2O hm^-2,respectively,Among the treatments designed ,Treatment N2K2 with a nutrient suply ration of N:P2O5:K2O:MgO=1.25:1.275:0.28 gave the highest tuber yield nd dry matter ,highest starch and Zn and lowest NO3^- contents in tuber,and high N,P and K use effciency with and uptake ratio of N:P:K:Mg=11.38:1:13.32:0.33 by tuber,Yield and starch and protein contents of tuber were the lowest in Treatment N0K2.Dry matter was the highest N,P and K utilization rates .Statistical analysis showed that yields of tuber and starch were in a positive linear correlation with the uptake amount of various nutrients and protein of the potato tuber was in a significantly positive linear correlation with tuber N content and in a singificantly negative linear correlation with tuber K and Mg contents .Balaced application of N,P,K and Mg fertilizers(Treatment N2K2)was recommended for realiztion of high yield and good quality in potato cultivation. |
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