1.054
IF5
1.150
IF
Q3
JCR
1.7
CiteScore
0.396
SJR
Q2
SJR
40
MNiSW
148.75
ICV
ORIGINAL PAPER
 
CC-BY 4.0
 
 

Histology of tissues and cell wall of rice straw influenced by treatment with different chemicals and rumen degradation

D. Liu 1,  
J. X. Liu 1  ,  
S. L. Zhu 1,  
X. J. Chen 2,  
 
1
Zhejiang University, College of Animal Sciences, Hangzhou 310029, P.R. China
2
Hangzhou Teachers College, School of Life Science, Hangzhou 310012, P.R. China
J. Anim. Feed Sci. 2005;14(2):373–387
Publication date: 2005-03-18
KEYWORDS
ABSTRACT
Rice straw (RS) was treated with urea, ammonium bicarbonate (NH4HCO3) and sodium hydroxide (NaOH), respectively. Treatments with urea, NH4HCO3 and NaOH increased the in sacco dry matter degradability of RS from 45.3 (untreated) to 52.5, 53.2 and 63.6%, respectively (P<0.01). The untreated and treated RS stem samples were digested in the rumen of a Huzhou sheep for 12, 24, 48 and 72 h and examined for the degradation of tissues and cell walls by using a scanning electron microscope (SEM), and a transmission electron microscope (TEM). Parenchyma was slightly distorted by treatment with urea or NH4HCO3, but severely distorted by NaOH treatment. The chemical treatments had little effect on other tissues of RS stem. All three treatments accelerated the degradation of parenchyma at 12 and 24 h, and NaOH treatment made the parenchyma degraded to most extent. Sclerenchyma cell wall in the untreated RS was slightly digested and still left partial secondary wall and complete middle lamella and primary wall even at 72 h, but NaOH-treated sclerenchyma cell wall began to be degraded at 48 h and just left the middle lamella and occasional primary wall at 72 h. All three treatments made the phloem absent at 48 h, but had little effect on the digestion of epidermis and xylem of vascular tissue. These results indicated that NaOH treatment had the best effects on the modification of structure of rice straw stems and the digestion of tissues and cell wall, and that the positive effects of NH4HCO3 treatment basically paralleled those of urea treatment. The improvement in digestion of histological structures was accordant entirely with the increase of in sacco degradability of RS after the three treatments. It is suggested that the histological methods by means of microscopical techniques such as SEM and TEM are conducive to a direct insight into the mechanism with which chemical treatments exerted the effects on the improvement of nutritive value of RS.
CORRESPONDING AUTHOR
J. X. Liu   
Zhejiang University, College of Animal Sciences, Hangzhou 310029, P.R. China
 
CITATIONS (5):
1. Comparison of microbial communities and histological changes in Phase I rice straw-based Agaricus bisporus compost prepared using two composting methods
Ting-ting Song, Wei-ming Cai, Qun-li Jin, Wei-lin Feng, Li-jun Fan, Ying-yue Shen, Hao Fang, Fang-fang Tian
Scientia Horticulturae
2. Enhancement of paddy straw digestibility and biogas production by sodium hydroxide-microwave pretreatment
Karamjeet Kaur, Urmila Gupta Phutela
Renewable Energy
3. Histological and rumen degradation changes of rice straw stem epidermis as influenced by chemical pretreatment
J.K. Wang, J.X. Liu, J.Y. Li, Y.M. Wu, J.A. Ye
Animal Feed Science and Technology
4. Effects of chemical treatments of rice straw on rumen fermentation characteristics, fibrolytic enzyme activities and populations of liquid- and solid-associated ruminal microbes in vitro
X.L. Chen, J.K. Wang, Y.M. Wu, J.X. Liu
Animal Feed Science and Technology
5. Effects of Ammoniating Pressures on Structure of Stem Tissues of Rice Straw
Donghua Chen, Yongze Jie, Huitang Li, Fanglu Lu, Jun Bao
2009 First International Conference on Information Science and Engineering
ISSN:1230-1388