| This article has been：Browse 1896Times Download 2172Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.20180066 |
|
| The Effects of Amending Soil with Coal Humic Acid on Soil Physical Property and Physiological Growth of Maize |
|
GU Xin, REN Cuimei, YANG Li, WANG Lina, GAO Guojin, LI Jianying, ZHU Lei, DU Zhiqiang
|
|
Daqing Branches of Heilongjiang Academy of Agricultural Sciences, Daqing 163316, China
|
| Abstract: |
| 【Objective】The overarching objective of this paper is to experimentally elucidate the effects of amending soil with coal humic acid on soil physical properties and growth of maize.【Method】The variety of Xianyu 335 maize was used as model plant, and we examined six treatments: Control without any applications (CK), chemical fertilizer in one application (T1), low application of coal humic acid (T2), moderate application of coal humic acid (T3), high application of coal humic acid (T4), low fertilizer coupled with low humic acid application (T5). All experiments were conducted at the Daqing base of Heilongjiang Academy of Agricultural Sciences. 【Result】Application of coal humic acid significantly increased soil water content and reduced soil bulk density. T4 had the highest soil water content with an average of 19.2%, approximately 30% higher than that under CK. The soil bulk density differed significantly between treatments (P<0.05), ranging between 0.97 g/cm3 and 1.28 g/cm3 with the impact of the treatment ranked in the order of CK> T1> T5> T2> T3> T4. Fertilization and coal humic acid benefited maize growth, and an appropriate application of coal humic acid promoted the plant growing to 329.3 cm high (T3), approximately 14% higher than that under CK. The average stem diameter under T5 was 3.03 cm, not significantly different from T3 and T4 but significantly bigger than other treatments (P<0.05). The average grain yield under T3 and T5 was 11 371.5 kg/hm2 and 11 077.5 kg/hm2 respectively, 16.8% and 20% respectively higher than the yield of CK.【Conclusion】Applying an appropriate amount of coal humic acid can improve physical and biochemical properties of soil, which is beneficial to growth and development of maize thereby increasing its yield. |
| Key words: humic acid; soil; maize; fertilizer |
|
|
