磁混肥对梨果产量品质及梨树酶活性的研究

磁混肥比混肥和习惯用肥明显增产。其中,以每株施花肥、壮果肥粪水各5kg,50kg和磁混肥1.5kg,2.3kg的产量最高,其糖/酸比值为67.3,叶片中养分N∶P_2O_5∶K_2O=1.0∶0.17∶0.60,磷含量高。日增长体积以每株施花肥、果肥粪水各25kg,50kg和磁混肥0.75kg,1.17kg处理最大,为6.06×10~(-6)mm~3。磁混肥处理SOD酶活力前期强,利于抗衰老,其后逐渐减弱,有利促进梨果成熟。

STUDY ON THE EFFECTS OF MAGNETIC MIXTURE FERTILIZER ON ENZYME ACTIVITY IN PEAR TREES AND ON THE QUALITY OF THEIR FRUIT

Application of magnetic muxture fertilizer, a newly developed variety of fertilizer which is made of normal fertilizers mixed with pro-magnetized coal fly-ash, resulted in much higher yield than application of mixture, fertilizer or farm yard manure (FYM) alone. Highest yield was obtained when 5 kg of FYM plus 1. 5 kg magnetic fertilizer per plant were applied at flowering and 50 kg of FYM plus 2. 33 kg of magnetic mixture fertilizer were applied at fruit expansion stage. The sugar :acid ratio of the fruit was 67. 3 while in the leaves N : P2O5: K2O was 1.0= 0. 7: 0. 60 with considerable high P. The maximum daily increase in fruit size (6. 06 X 10~6 mm3) occurred in the treatment where 25 and 50 kg/plant and 0. 75 and 1. 7 kg/plant of FYM and magnetic fertilzer were applied at flowering and fruit expansion stage, respectively. SOD activity appeared high in the early period of fruit growth, thus favoring a delay .in aging while it was relatively low in later period and therefore, accelerated the ripening of the fruit.