Crops ›› 2018, Vol. 34 ›› Issue (2): 114-117.doi: 10.16035/j.issn.1001-7283.2018.02.020

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Effects of Peeling Husk on Grain Dehydration of Maize

Li Lulu,Xie Ruizhi,Wang Keru,Ming Bo,Hou Peng,Li Shaokun   

  1. Institute o f Crop Science, Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and Ecology, Beijing 100081, China
  • Received:2017-11-18 Revised:2018-02-11 Online:2018-04-20 Published:2018-08-27

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Abstract:

In 2015 and 2016, the experiment was designed with varying peeling-husk treatments to indentify the effects of husk layers on maize grain moisture content using Zhengdan 958 and Xianyu 335 cultivars. Results showed that: (1) There weren’t significant differences in grain moisture content among the one, two, three layer peeling-husk treatments and CK at same sampling time; the four to six layer peeling-husk treatments affected grain dry-down process on varying degrees; grain moisture content in the all layer peeling-husk treatment was significantly lower than CK throughout sampling time. (2) Under the all layer peeling-husk treatments, 100-grain weight of Zhengdan 958 and Xianyu 335 were significantly reduced by 9.77%-13.29% and 15.40%-16.37%. 100-grain weight had no difference between the other treatments and CK. It should be cautious to peel all the husks too early since the 100-grain weight substantially decreased under the all layer peeling-husk treatment. Reducing the layer number of husk was conducive to grain dehydration and did not reduce the grain weight, which should be considered in breeding the high dehydration rate cultivars suitable for mechanical grain harvesting.

Key words: Maize, Husk, Layer number of husk, Grain moisture content

Table 1

Grain moisture changes of different peeling-husk treatments in 2015 %"

处理
Treatment		 日期Date
9-03 9-08 9-14 9-20 9-27 10-03 10-13 10-17 10-22 10-28 11-02
ZD958-CK 55.92 55.18a 46.41ab 40.03a 36.15a 34.59a 29.18a 26.26a 25.15a 22.60a 19.95ab
ZD958-1 55.92 56.01a 48.56a 40.19a 35.73a 33.20a 29.44a 26.50a 22.76ab 23.71a 20.69a
ZD958-2 55.92 54.39a 48.16a 40.94a 36.33a 33.31a 27.11bc 25.11a 23.00ab 22.66a 20.96a
ZD958-3 55.92 54.09a 47.82a 40.70a 36.79a 33.02a 28.97ab 26.54a 22.56ab 22.19a 19.44abc
ZD958-4 55.92 55.46a 48.18a 40.62a 36.62a 33.57a 26.15cd 21.19b 22.20ab 21.33ab 17.45bcd
ZD958-5 55.92 54.26a 46.07ab 40.16a 34.06a 29.34b 24.30d 18.18bc 18.40bc 18.58bc 16.99cd
ZD958-no 55.92 49.05b 44.15b 37.08b 33.18a 27.22b 17.73e 15.60c 15.60c 16.88c 15.99d
XY335-CK 55.51 51.88a 46.10abc 43.69a 37.98a 32.69a 25.50a 23.28a 20.47a 19.02a 17.14ab
XY335-1 55.51 51.66a 47.33a 42.22a 36.88ab 32.28a 26.12a 22.22ab 20.09a 19.19a 18.39a
XY335-2 55.51 50.87a 46.81abc 42.66a 36.28ab 30.84ab 25.02ab 23.61a 20.38a 18.82a 16.67bc
XY335-3 55.51 51.52a 46.29abc 43.65a 36.40ab 30.96ab 24.92ab 21.26ab 19.00ab 18.53a 15.23c
XY335-4 55.51 50.29a 47.10ab 40.62ab 34.95bc 32.02a 25.57a 18.83bc 17.26bc 17.50ab 15.30c
XY335-5 55.51 50.38a 44.68bcd 40.62ab 33.32c 28.60bc 22.64b 18.90bc 14.75cd 15.26b 13.09d
XY335-6 55.51 50.32a 44.57cd 38.01bc 33.17c 27.67c 19.80c 16.49cd 15.34cd 15.24b 12.96d
XY335-no 55.51 47.11b 42.53d 35.45c 30.51d 26.53c 13.15d 13.46d 13.21d 15.22b 11.93d

Table 2

Grain moisture changes of different peeling-husk treatments in 2016 %"

处理
Treatment		 日期 Date
8-25 8-30 9-04 9-09 9-15 9-20 10-01 10-07 10-16
ZD958-CK 49.46 43.92b 42.51a 36.11a 32.79a 31.86a 26.86a 22.73a 19.68a
ZD958-4 49.46 44.04b 42.39a 35.08ab 32.84a 31.04a 27.07a 23.22a 20.71a
ZD958-no 49.46 43.24b 39.39b 33.96b 30.59b 27.49b 18.88b 15.42b 15.66b
XY335-CK 48.12 45.93a 40.26a 35.66a 32.78a 27.33a 19.62a 16.52a 14.38a
XY335-4 48.12 44.67a 41.21a 36.35a 33.34a 26.11a 18.65ab 15.63a 14.65a
XY335-no 48.12 40.54b 35.59b 31.04b 24.37b 17.43b 15.82b 12.35b 13.19b

Table 3

Grain dry weight of different peeling-husk treatments in 2015 and 2016"

年份
Year		 处理
Treatment		 百粒干重(g)
100-grain dry weight
2015 ZD958-CK 34.80a
ZD958-1 34.80a
ZD958-2 34.38a
ZD958-3 33.60a
ZD958-4 33.24a
ZD958-5 34.45a
ZD958-no 31.40b
XY335-CK 37.45a
XY335-1 37.12a
XY335-2 37.37a
XY335-3 37.21a
XY335-4 36.21a
XY335-5 36.47a
XY335-6 35.55a
XY335-no 31.32b
2016 ZD958-CK 31.16a
ZD958-4 31.99a
ZD958-no 27.02b
XY335-CK 33.31a
XY335-4 32.90a
XY335-no 28.18b
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