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Shvoong Home>Science>Agronomy - Agriculture>Investigation of fertilization on citrus in Hubei Province Summary

Investigation of fertilization on citrus in Hubei Province

Article Summary   by:TsingHua     Original Author: Hubei Agricultural Sciences
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An investigation of orange production and nutrients management on citrus was carried out in Hubei Province,one of the main citrus growth area in China,including 111 citrus orchards distributed in 13 counties It was showed that 91 9%,86 5% and 68 5% orchards was applied N,P and K fertilizer both in organic and/or inorganic fertilizer,and only 45 0% citrus was applied organic manure The average of N,P and K application rates (per tree and one year) were 0 38 kg N,0 18kg P 2O 5 and 0 13 kg K 2O,respectively Inorganic resource N,P and K account for 78 9%?72 2% and 61 5% N∶P 2O 5∶K 2O application ratio was 1∶0 47∶0 34 and inorganic fertilizer N∶P 2O 5∶K 2O ratio was 1∶0 43∶0 27 The result indicated that fertilizer application considerably increased orange yield Compared with the yield without nutrient application,N,P and K fertilization raised fruit yield by 58 2%,3 4% and 49 0% The nutrients application efficiency of N,P and K was 65 3 kg fruit per kg K 2O,and 30 5 kg fruit per kg N and 5 5 kg fruit per kg P 2O 5,respectively The investigation also demonstrated that foliar spray was a good measure for citrus nutrients management The percentage of KH 2PO 4,Urea,B and Zn spray was 35 3%,23 5%,19 6% and 13 7%,respectively The problems in citrus nutrients management were displayed as follow:(1)The difference of nutrients application rate was large in different areas and different orchards (2)Generally speaking,the nutrients application rate was low (3)The nutrients rate from organic manure was low and the percentage was small (4)The ratio of N∶P∶K was unbalanced especially K was too low (5)The nutrients distribution in different time was unsuitable especially in fruit expanding stage the nutrients application was too small In the end of the paper some suggestions were gave for citrus nutrients management
Published: March 30, 2003   
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