Nutrient value of wild fodder species and the implications for improving the diet of mithun (Bos frontalis) in Dulongjiang area, Yunnan Province, China

doi:10.1016/j.pld.2020.09.007

Plant Diversity ›› 2020, Vol. 42 ›› Issue (06): 455-463.DOI: 10.1016/j.pld.2020.09.007

Nutrient value of wild fodder species and the implications for improving the diet of mithun (Bos frontalis) in Dulongjiang area, Yunnan Province, China

Yanfei Geng^a,b,c, Sailesh Ranjitkar^c,d,e, Qiaoshun Yan^b, Zhijun He^f, Baqi Su^f, Shengtao Gao^g, Junli Niu^g,h, Dengpan Bu^c,g,i, Jianchu Xu^b,c,g,j

a College of Tea Science, Guizhou University, Guiyang 550025, China;
b Key Laboratory of Economic Plants and Biotechnology, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China;
c CAAS-ICRAF Joint Lab on Agroforestry and Sustainable Animal Husbandry, World Agroforestry, East and Central Asia, Beijing 100193, China;
d NGene, Solutions of Natural Innovation, Kathmandu, GPO 44614, Nepal;
e Mid-Western University, Faculty of Humanities and Social Science, Naya Bato, Lalitpur 44600, Nepal;
f Agriculture Bureau of Gongshan Derung and Nu Autonomous County, Nujiang 673500, China;
g State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
h College of Animal Science and Technology, Shihezi University, Shihezi 832003, China;
i Hunan Co-Innovation Center of Animal Production Safety, CICAPS, Changsha 410128, China;
j World Agroforestry, East and Central Asia, Kunming 650201, China

收稿日期:2020-04-30 修回日期:2020-09-08 出版日期:2020-12-25 发布日期:2021-03-03
通讯作者: Jianchu Xu
基金资助:
We are thankful to Jian Wang, Xin Zhang, Lu Ma and Lingling Sun from Institute of Animal Science, Chinese Academy of Agricultural Sciences for being helpful in lab work. Special gratitude is expressed to Dr. Fiona R. Worthy from ‘Centre for Mountain Ecosystem Studies’ at the Kunming Institute of Botany for English editing. This research was funded by the Chinese Academy of Agricultural Science and Technology Innovation Program (CAASXTCX2016011-01; ASTIP-IAS07), Talent Project of Guizhou University[(2018)06] and National Natural Science Foundation of China (31900275). We also acknowledge supports from CGIAR research programs on ‘Forests, Trees and Agroforestry’ (CRP6.2) and Strategic Priority Research Program of Chinese Academy of Sciences (No. XDA20050204, XDA19050303).

Nutrient value of wild fodder species and the implications for improving the diet of mithun (Bos frontalis) in Dulongjiang area, Yunnan Province, China

Yanfei Geng^a,b,c, Sailesh Ranjitkar^c,d,e, Qiaoshun Yan^b, Zhijun He^f, Baqi Su^f, Shengtao Gao^g, Junli Niu^g,h, Dengpan Bu^c,g,i, Jianchu Xu^b,c,g,j

a College of Tea Science, Guizhou University, Guiyang 550025, China;
b Key Laboratory of Economic Plants and Biotechnology, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China;
c CAAS-ICRAF Joint Lab on Agroforestry and Sustainable Animal Husbandry, World Agroforestry, East and Central Asia, Beijing 100193, China;
d NGene, Solutions of Natural Innovation, Kathmandu, GPO 44614, Nepal;
e Mid-Western University, Faculty of Humanities and Social Science, Naya Bato, Lalitpur 44600, Nepal;
f Agriculture Bureau of Gongshan Derung and Nu Autonomous County, Nujiang 673500, China;
g State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
h College of Animal Science and Technology, Shihezi University, Shihezi 832003, China;
i Hunan Co-Innovation Center of Animal Production Safety, CICAPS, Changsha 410128, China;
j World Agroforestry, East and Central Asia, Kunming 650201, China

Received:2020-04-30 Revised:2020-09-08 Online:2020-12-25 Published:2021-03-03
Contact: Jianchu Xu
Supported by:
We are thankful to Jian Wang, Xin Zhang, Lu Ma and Lingling Sun from Institute of Animal Science, Chinese Academy of Agricultural Sciences for being helpful in lab work. Special gratitude is expressed to Dr. Fiona R. Worthy from ‘Centre for Mountain Ecosystem Studies’ at the Kunming Institute of Botany for English editing. This research was funded by the Chinese Academy of Agricultural Science and Technology Innovation Program (CAASXTCX2016011-01; ASTIP-IAS07), Talent Project of Guizhou University[(2018)06] and National Natural Science Foundation of China (31900275). We also acknowledge supports from CGIAR research programs on ‘Forests, Trees and Agroforestry’ (CRP6.2) and Strategic Priority Research Program of Chinese Academy of Sciences (No. XDA20050204, XDA19050303).

摘要/Abstract

摘要： Wild fodder plants are valuable because they provide an important livestock feed resource globally, especially for smallholder farmers, and have important roles in natural resource management. In-depth knowledge of wild forage plants can motivate local people for feed resource and habitat conservation of threatened herbivores such as Mithun (Bos frontalis). Mithun occur in small patches in the mountains of Dulongjiang, nearby villagers domesticated this animal but left animal to freely graze in the mountains. Many fodder plants occur in these mountains, however, little is known about their nutritional value. We conducted an ethnobotanical survey to document important wild fodder plants consumed by mithun in the Dulongjiang Township. The nutritional content of 21 highly mentioned wild fodder plants in an ethnobotanical survey was examined. Laboratory analysis showed that Fagopyrum dibotrys were the fodder species with the highest crude protein (CP) content (26.89%), followed by Polygonum molle (21.88%) and Hydrangea longipes (21.12%). Synthesis of relative feed value index and grey relational grade, P. molle, H. longipes and Tetrastigma obtectum were ranked the top three nutritional fodders. There was a significant difference between 21 species on their in vitro digestibility and the most highly digestible fodder species was Elatostema hookerianum. Linear model analysis on relationship between frequency of citation of 21 wild forage plants by local farmers and their nutrient composition showed that the frequency was significantly positively correlated with the nutritional value of the feed (R²=0.28, P<0.05). We concluded that these species have high nutritional values to improve mithun production in integrated crop-livestock systems. Fodder species or mixtures of species with useful nutritional characters could be cultivated to improve livestock productivity, habitat conservation including that of mithun and wild forage resource management.

关键词: Wild fodder species, Nutritional value, Mithun, Nature conservation

Abstract: Wild fodder plants are valuable because they provide an important livestock feed resource globally, especially for smallholder farmers, and have important roles in natural resource management. In-depth knowledge of wild forage plants can motivate local people for feed resource and habitat conservation of threatened herbivores such as Mithun (Bos frontalis). Mithun occur in small patches in the mountains of Dulongjiang, nearby villagers domesticated this animal but left animal to freely graze in the mountains. Many fodder plants occur in these mountains, however, little is known about their nutritional value. We conducted an ethnobotanical survey to document important wild fodder plants consumed by mithun in the Dulongjiang Township. The nutritional content of 21 highly mentioned wild fodder plants in an ethnobotanical survey was examined. Laboratory analysis showed that Fagopyrum dibotrys were the fodder species with the highest crude protein (CP) content (26.89%), followed by Polygonum molle (21.88%) and Hydrangea longipes (21.12%). Synthesis of relative feed value index and grey relational grade, P. molle, H. longipes and Tetrastigma obtectum were ranked the top three nutritional fodders. There was a significant difference between 21 species on their in vitro digestibility and the most highly digestible fodder species was Elatostema hookerianum. Linear model analysis on relationship between frequency of citation of 21 wild forage plants by local farmers and their nutrient composition showed that the frequency was significantly positively correlated with the nutritional value of the feed (R²=0.28, P<0.05). We concluded that these species have high nutritional values to improve mithun production in integrated crop-livestock systems. Fodder species or mixtures of species with useful nutritional characters could be cultivated to improve livestock productivity, habitat conservation including that of mithun and wild forage resource management.

Key words: Wild fodder species, Nutritional value, Mithun, Nature conservation

Yanfei Geng, Sailesh Ranjitkar, Qiaoshun Yan, Zhijun He, Baqi Su, Shengtao Gao, Junli Niu, Dengpan Bu, Jianchu Xu. Nutrient value of wild fodder species and the implications for improving the diet of mithun (Bos frontalis) in Dulongjiang area, Yunnan Province, China[J]. Plant Diversity, 2020, 42(06): 455-463.

图/表 16

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土壤含水量(处理水平) Soil water content % FC (The level of drought)	体积含水量 Soil volumetric water content (%)	盆栽总质量(平均值±标准偏差) Pot’s mass (mean ± SD) (g)
80% FC (水分充足 Sufficient water)	28.8	13β696 ± 97
50% FC (轻度干旱 Mild drought)	18.0	12β979 ± 112
30% FC (中度干旱 Moderate drought)	10.8	12β357 ± 106
15%FC (重度干旱 Severe drought)	5.4	12β070 ± 84

土壤含水量(处理水平) Soil water content % FC (The level of drought)	体积含水量 Soil volumetric water content (%)	盆栽总质量(平均值±标准偏差) Pot’s mass (mean ± SD) (g)
80% FC (水分充足 Sufficient water)	28.8	13β696 ± 97
50% FC (轻度干旱 Mild drought)	18.0	12β979 ± 112
30% FC (中度干旱 Moderate drought)	10.8	12β357 ± 106
15%FC (重度干旱 Severe drought)	5.4	12β070 ± 84

试验代号 Test code	土壤水分含量 Soil moisture content (% FC)	氮水平 N level (g·pot^-1)
15N0	15	0
15MN	15	1.35
15HN	15	2.70
30N0	30	0
30MN	30	1.35
30HN	30	2.70
50N0	50	0
50MN	50	1.35
50HN	50	2.70
80N0	80	0
80MN	80	1.35
80HN	80	2.70

试验代号 Test code	土壤水分含量 Soil moisture content (% FC)	氮水平 N level (g·pot^-1)
15N0	15	0
15MN	15	1.35
15HN	15	2.70
30N0	30	0
30MN	30	1.35
30HN	30	2.70
50N0	50	0
50MN	50	1.35
50HN	50	2.70
80N0	80	0
80MN	80	1.35
80HN	80	2.70

处理 Treatment		土壤含水量 Soil moisture content
处理 Treatment		80% FC	50% FC	30% FC	15% FC	平均值 Mean
氮水平 N level	N0	3.35 ± 0.11^Cb	2.23 ± 0.25^Cc	2.60 ± 0.03^Cbc	8.33 ± 0.27^Ca	4.13 ± 2.57^C
	MN	5.77 ± 0.55^Bc	5.97 ± 0.16^Bc	12.93 ± 0.33^Bb	18.48 ± 0.18^Ba	10.79 ± 5.54^B
	HN	10.88 ± 0.09^Ac	7.43 ± 0.20^Ad	26.90 ± 1.85^Ab	37.74 ± 0.17^Aa	20.74 ± 12.83^A
平均值 Average value		6.67 ± 3.34^c	5.21 ± 2.33^d	14.14 ± 10.60^b	21.52 ± 12.94^a
F(SW×SN)		332.84^**
F(SW)		11β481.98^**
F(SN)		2β442.89^**

Nutrient value of wild fodder species and the implications for improving the diet of mithun (Bos frontalis) in Dulongjiang area, Yunnan Province, China

Nutrient value of wild fodder species and the implications for improving the diet of mithun (Bos frontalis) in Dulongjiang area, Yunnan Province, China

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指标 Index	处理 Treatment		土壤含水量 Soil moisture content				平均值 Mean	F
指标 Index	处理 Treatment		80% FC	50% FC	30% FC	15% FC	平均值 Mean	F
SOD活性 SOD activity (U·g^-1·min^-1)	氮水平 N level	N0	1β251.53 ± 2.25^Ab	1β337.66 ± 24.89^Aa	1β041.02 ± 53.00^Cc	897.28 ± 42.24^Bd	1β131.87 ± 183.48^B	F(SW×SN) = 36.74^ F(SW) = 161.34^ F(SN) = 58.74^**
		MN	1β284.91 ± 1.15^Aa	1β306.73 ± 6.73^ABa	1β143.10 ± 33.87^Bb	1β136.76 ± 16.73^Ab	1β217.87 ± 83.47^C
		HN	1β258.43 ± 4.21^Ab	1β278.82 ± 18.54^Bb	1β336.30 ± 37.39^Aa	1β113.63 ± 17.59^Ac	1β246.80 ± 87.83^A
	平均值 Mean		1β264.96 ± 15.46^b	1β307.74 ± 30.03^a	1β173.47 ± 134.93^c	1β049.22 ± 116.96^d
POD活性 POD activity (U·g^-1·min^-1)	氮水平 N level	N0	2β153.65 ± 1.49^Bab	2β043.13 ± 27.43^Ab	2β200.82 ± 39.94^Ba	2β073.00 ± 61.27^Bb	2β117.65 ± 73.54^B	F(SW×SN) = 36.19^ F(SW) = 24.11^ F(SN) = 123.95^**
		MN	1β888.18 ± 39.09^Ca	1β960.08 ± 30.45^Aa	1β749.85 ± 141.03^Cb	1β673.58 ± 17.14^Cb	1β817.92 ± 133.86^C
		HN	2β347.99 ± 134.53^Ab	1β720.76 ± 73.13^Bc	2β545.87 ± 62.54^Aa	2β412.04 ± 48.07^Ab	2β256.67 ± 339.69^A
	平均值 Mean		2β129.94 ± 211.82^a	1β907.99 ± 150.89^c	2β165.51 ± 354.77^a	2β052.87 ± 322.59^b
CAT活性 CAT activity (U·g^-1·s^-1)	氮水平 N level	N0	2.90 ± 0.06^Ab	3.15 ± 0.05^Aa	3.10 ± 0.05^ABa	2.60 ± 0.04^Bc	2.93 ± 0.23^A	F(SW×SN) = 8.39^ F(SW) = 28.39^ F(SN) = 21.69^**
		MN	2.52 ± 0.15^Bc	2.74 ± 0.09^Cb	3.02 ± 0.02^Ba	2.75 ± 0.09^Bb	2.75 ± 0.20^B
		HN	2.74 ± 0.11^Ad	2.94 ± 0.10^Bcd	3.26 ± 0.09^Aa	3.04 ± 0.10^Abc	3.01 ± 0.21^A
	平均值 Mean		2.74 ± 0.21^c	2.94 ± 0.19^b	3.12 ± 0.12a	2.79 ± 0.21^c

处理 Treatment		土壤含水量 Soil moisture content
处理 Treatment		80% FC	50% FC	30% FC	15% FC	平均值 Mean
氮水平 N level	N0	0.516 ± 0.007^Bb	0.536 ± 0.009^Bb	0.605 ± 0.008^Aa	0.612 ± 0.010^ABa	0.568 ± 0.045^A
	MN	0.548 ± 0.005^Ab	0.564 ± 0.011^Ab	0.569 ± 0.009^Bb	0.595 ± 0.013^Ba	0.569 ± 0.020^A
	HN	0.523 ± 0.009^ABc	0.548 ±0.010 ^ABc	0.574 ± 0.008^Bb	0.633 ± 0.036^Aa	0.569 ± 0.046^A
平均值 Mean		0.529 ± 0.015^d	0.549 ± 0.015^c	0.583 ± 0.018^b	0.614 ± 0.026^a
F(SW×SN)		6.560^**
F(SW)		67.479^**
F(SN)		0.062

处理 Treatment		土壤含水量 Soil moisture content
处理 Treatment		80% FC	50% FC	30% FC	15% FC	平均值 Mean
氮水平 N level	N0	0.516 ± 0.007^Bb	0.536 ± 0.009^Bb	0.605 ± 0.008^Aa	0.612 ± 0.010^ABa	0.568 ± 0.045^A
	MN	0.548 ± 0.005^Ab	0.564 ± 0.011^Ab	0.569 ± 0.009^Bb	0.595 ± 0.013^Ba	0.569 ± 0.020^A
	HN	0.523 ± 0.009^ABc	0.548 ±0.010 ^ABc	0.574 ± 0.008^Bb	0.633 ± 0.036^Aa	0.569 ± 0.046^A
平均值 Mean		0.529 ± 0.015^d	0.549 ± 0.015^c	0.583 ± 0.018^b	0.614 ± 0.026^a
F(SW×SN)		6.560^**
F(SW)		67.479^**
F(SN)		0.062

处理 Treatment		土壤含水量 Soil moisture content
处理 Treatment		80% FC	50% FC	30% FC	15% FC	平均值 Mean
氮水平 N level	N0	7.57 ± 0.06^Aa	6.86 ± 0.13^Ab	4.61 ± 0.16^Cd	5.53 ± 0.10^Cc	6.14 ± 1.20^B
	MN	6.65 ± 0.05^Bb	5.84 ± 0.13^Bc	5.34 ± 0.48^Bd	7.16 ± 0.06^Aa	6.25 ± 0.77^B
	HN	5.79 ± 0.03^Cc	6.16 ± 0.38^Bb	7.72 ± 0.14^Aa	6.37 ± 0.21^Bb	6.51 ± 0.79^A
平均值 Mean		6.67 ± 0.77^a	6.28 ± 0.50^b	5.89 ± 1.43^b	6.35 ± 0.71^c
F(SW×SN)		99.28^**
F(SW)		21.61^**
F(SN)		10.15^**

处理 Treatment		土壤含水量 Soil moisture content
处理 Treatment		80% FC	50% FC	30% FC	15% FC	平均值 Mean
氮水平 N level	N0	7.57 ± 0.06^Aa	6.86 ± 0.13^Ab	4.61 ± 0.16^Cd	5.53 ± 0.10^Cc	6.14 ± 1.20^B
	MN	6.65 ± 0.05^Bb	5.84 ± 0.13^Bc	5.34 ± 0.48^Bd	7.16 ± 0.06^Aa	6.25 ± 0.77^B
	HN	5.79 ± 0.03^Cc	6.16 ± 0.38^Bb	7.72 ± 0.14^Aa	6.37 ± 0.21^Bb	6.51 ± 0.79^A
平均值 Mean		6.67 ± 0.77^a	6.28 ± 0.50^b	5.89 ± 1.43^b	6.35 ± 0.71^c
F(SW×SN)		99.28^**
F(SW)		21.61^**
F(SN)		10.15^**