Research on Roughage Harvested by Defoliation at Late Growth Stage of Corn

doi:10.7668/hbnxb.2011.S1.029

Abstract

Abstract: The roughage harvested from corn by different combinations of defoliation was studied during milk ripe and full ripe stage for solving feed shortage of the ecotone between agriculture and animal husbandry in Northeast China during summer and autumn.The results showed that defoliation(cutting the top)at some stages could not reduce grain yield,and could harvest much forage,which was about equivalent to forage yield of 1-2 hectares grassland.Meanwhile,the concentrations of crude protein and metabolizable energy and digestibility of haversted roughage were maintained at a relatively high level.The content crude protein was 5.01%-8.48%DM,in vitro dry matter digestibility ranged from 52.74% to 64.65% DM,metabolizable energy concentration was between 6.84-8.51 MJ/kg DM.Defoliation at late growth stage of corn can offer high quality roughage for the ecotone between agriculture and animal husbandry in Northeast China.

Key words: Corn Defoliation, High quality roughage, Grain yield

CLC Number:

S513.01

WANG Min-ling, SUN Hai-xia, ZHOU Dao-wei. Research on Roughage Harvested by Defoliation at Late Growth Stage of Corn[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2011, 26(S1): 137-142. doi: 10.7668/hbnxb.2011.S1.029.

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http://www.hbnxb.net/EN/Y2011/V26/IS1/137

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