Abstract
The experiment was conducted to optimize the level of humic acid, zinc and boron for better
growth, enhanced yield and grain quality of wheat crop cultivated under field condition. Growth
characteristics, yield and its components, and zinc concentrations in straw and grain were
analyzed under two application rate of humic acid (0 and 10 kg ha-1
), three level of boron (B0 = 0,
B1 = 2 and B2 = 4 kg ha-1
) and zinc (Zn0 = 0, Zn1 = 5 and Zn2 =10 kg ha-1
). Results revealed that
application of Zn at 10 kg ha-1 and B at 4 kg ha-1 combine with humic acid (10 kg ha-1
)
significantly increased yield and its components (except flag leaf area under humic acid
application), and Zn contents in straw. The maximum plant height, spike length and grain filling
rate were recorded at Zn2 and B2 with humic acid application. Maximum grain yield was
produced for Zn2 and B2 under humic acid application, which was associated with higher 1000-
grain weight and biological yield. Maximum biological and straw yields were produced by
application of Zn2 and B2 under humic acid fertilization. Maximum Zn contents in straw have
been recorded for Zn2 and B2 under humic acid application, while maximum values of crude protein and Zn contents in Zn2 and B2 were statically same with Zn1 and B1 under humic acid
application. Furthermore, the highest boron contents in grain were recorded for Zn2 and B2, and
these values were statistically same with Zn2 and B1 under humic acid application. It is concluded
that application of Zn2 and B2 in combination with humic acid could be a good agronomic
practice to enhance the zinc content in straw and grain yield of wheat crop.
Maqsood ul Hussan, Muhammad Farrukh Saleem, Muhammad Bilal Hafeez, Shahbaz Khan, Sadam Hussain, Naeem Ahmad, Yasir Ramzan, Majid Nadeem. (2021) Impact of soil applied humic acid, zinc and boron supplementation on the growth, yield and zinc translocation in winter wheat, Asian Journal of Agriculture and Biology, Volume-09, Issue-2.
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