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| Effect of Organic Soil Substrate Cultivation on Ginger Yield and NPK Utilization Efficiency |
| SONG Xiao-yi，XU Kun*，WANG Zhong-bin，ZHANG Yong-zheng |
| State Key Laboratory of Crop Biology，Ministry of Agriculture Key Laboratory of Horticultural Crop Biology and Germplasm Creation in Huang-Huai Region，College of Horticulture Science and Engineering，Shandong Agricultural University，Tai’an 271018，Shandong，China |
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Abstract In order to improve the fertilizer utilization efficiency of ginger（Zingiber officinale Rosc.）cultivated with organic soil substrate，this paper studied the growth，absorption and utilization of N，P and K of ginger，cultivated under organic soil substrate cultivation without fertilization（T1），under organic soil substrate cultivation with equivalent fertilization to soil（T2）and under organic soil substrate cultivation with fertilization according to the target production（T3），with conventional soil cultivation without fertilization（CK1）and conventional soil cultivation（CK2）．The results showed that the biomasses of ginger plant was ranked as T2 and T3 higher，T1 lower，CK2 in the middle．Compared with CK2 the biological yield and economical yield of T1 decreased 27.63% and 23.01%，respectively，while that of T2 and T3 increased 17.46%，15.36% and 11.05%，13.04%．The biological yield of T2 was significantly higher than T3，but their economical yields did not have much difference．The utilization rate of N，P2O5，K2O in T3 were at their highest levels with 35.11%，22.81% and 46.25%，increased 7.31 percentage point，3.65 percentage point，14.98 percentage point than that of CK2，respectively．Meanwhile the utilization rate of N，K2O of T3 were also higher than that of T2．However，their utilization rates of P2O5 did not have much difference．The ginger agronomic efficiency and partial factor productivity of T3 were respectively 14.46 kg?kg-1 and 45.34 kg?kg-1．That of T2 and CK2 were only 10.26 kg?kg-1，30.86 kg?kg-1 and 11.25 kg?kg-1，26.75 kg?kg-1 ，respectively．These results indicated that applying appropriate amount of available fertilizer to organic soil substrate cultivation could improve fertilizer efficiency and productivity of ginger．
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Received: 03 January 2012
Published: 15 March 2012
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