Effects of nitrogen， phosphorus and potassium rationing on production performance and nutritional quality of Echinochloa frumentacea in saline soil

doi:10.11686/cyxb2024324

Abstract

Abstract:

The northern region of Ningxia has widely distributed saline and alkaline lands. Salinity， in turn， imposes limitations on use of land for crop and forage production， and such land typically has low soil fertility and low fertilizer response. These limitations seriously restrict the capacity for forage grass production in China. As a plant with wide adaptability and strong salinity tolerance， Hunan Jizi （Echinochloa frumentacea） is an important forage species for saline-alkaline land improvement and development of the forage and livestock industries. This experiment investigated the suitable fertilization rate for E. frumentacea on saline-alkaline land， using the ‘3414’ incomplete factorial experimental design to clarify the effects of different fertilization combinations of N， P and K on the production performance and nutritional quality of E. frumentacea. It was found that the average plant height of N₂P₁K₁ （N： 180 kg·ha^-1， P₂O₅： 45 kg·ha^-1， K₂O： 30 kg·ha^-1） was 1.58 m. The average yields of fresh herbage and hay in treatment N₂P₁K₁were， respectively， 67.24% and 62.09% higher than those of the no-fertilizer treatment （P<0.05）. Nitrogen-phosphorus-potassium fertilizer application significantly increased the nutritive value of Hunan Jizi， and the treatments with the highest crude protein and crude ash contents were N₂P₀K₂ （N： 180 kg·ha^-1， P₂O₅： 0 kg·ha^-1， K₂O： 60 kg·ha^-1）， with gains of 5.77% and 8.75%， respectively， compared to no fertilizer. Meanwhile， the relative feeding value and dry matter digestibility， total digestible nutrients， and net lactation energy were all highest under treatment N₀P₂K₂ （N： 0 kg·ha^-1， P₂O₅： 90 kg·ha^-1， K₂O： 60 kg·ha^-1）. Multivariate principal component analysis indicated the highest overall ranking was obtained under the treatment N₂P₁K₁. Based on these results， the recommended fertilizer combination for growing Hunan Jizi on saline and alkaline land in northern Ningxia is： N 180 kg·ha^-1， P₂O₅ 45 kg·ha^-1， and K₂O 30 kg·ha^-1.

Key words: Echinochloa frumentacea, combining application of nitrogen， phosphorus and potassium fertilizers, production performance, nutritional quality, comprehensive assessment

Ling-fei XIANG, Feng-ju ZHANG, Dong-mei MA, Jin-long LIU, Jian LAN, Jian-qiang DENG, Hai-ying HU, Bin WANG, Chun-jiang CAI, Qiao-li MA. Effects of nitrogen， phosphorus and potassium rationing on production performance and nutritional quality of Echinochloa frumentacea in saline soil[J]. Acta Prataculturae Sinica, 2025, 34(7): 185-195.

Figures/Tables 11

References 33

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项目 Items	主成分Principal component			项目 Items	主成分Principal component
项目 Items	I	II	III	项目 Items	I	II	III
酸性洗涤纤维Acid detergent fiber	0.986	-0.020	-0.114	粗灰分Crude ash	0.809	0.299	-0.355
总可消化养分Total digestible nutrients	-0.986	0.019	0.115	株高Plant height	0.790	0.035	0.219
泌乳净能Net energy for lactation	-0.986	0.020	0.114	粗蛋白Crude protein	0.414	0.783	-0.295
干物质消化率Dry matter digestibility	-0.986	0.020	0.114	叶绿素相对含量Relative chlorophyll content	0.272	0.637	0.343
相对饲喂价值Relative feeding value	-0.984	0.110	0.041	粗脂肪Ether extract	0.155	0.261	0.750
干物质采食量Dry matter intake	-0.967	0.172	0.001	特征值Eigenvalue	9.666	1.312	1.196
中性洗涤纤维Neutral detergent fiber	0.964	-0.193	-0.002	方差贡献率Variance contribution rate （%）	69.041	9.368	8.542
鲜草产量Fresh grass yield	0.850	-0.188	0.273	累积贡献率Accumulative contribution rate （%）	69.041	78.409	86.951
干草产量Hay yield	0.819	-0.133	0.355

项目 Items	主成分Principal component			项目 Items	主成分Principal component
项目 Items	I	II	III	项目 Items	I	II	III
酸性洗涤纤维Acid detergent fiber	0.986	-0.020	-0.114	粗灰分Crude ash	0.809	0.299	-0.355
总可消化养分Total digestible nutrients	-0.986	0.019	0.115	株高Plant height	0.790	0.035	0.219
泌乳净能Net energy for lactation	-0.986	0.020	0.114	粗蛋白Crude protein	0.414	0.783	-0.295
干物质消化率Dry matter digestibility	-0.986	0.020	0.114	叶绿素相对含量Relative chlorophyll content	0.272	0.637	0.343
相对饲喂价值Relative feeding value	-0.984	0.110	0.041	粗脂肪Ether extract	0.155	0.261	0.750
干物质采食量Dry matter intake	-0.967	0.172	0.001	特征值Eigenvalue	9.666	1.312	1.196
中性洗涤纤维Neutral detergent fiber	0.964	-0.193	-0.002	方差贡献率Variance contribution rate （%）	69.041	9.368	8.542
鲜草产量Fresh grass yield	0.850	-0.188	0.273	累积贡献率Accumulative contribution rate （%）	69.041	78.409	86.951
干草产量Hay yield	0.819	-0.133	0.355

材料Materials	Y₁	Y₂	Y₃	Y	排名Ranking	材料Materials	Y₁	Y₂	Y₃	Y	排名Ranking
N₀P₀K₀	-3.51	0.35	-1.37	-2.51	13	N₂P₂K₀	-0.02	-0.60	0.54	-0.03	9
N₀P₂K₂	-7.05	0.48	0.23	-4.80	14	N₂P₂K₁	0.89	-0.28	0.25	0.61	8
N₁P₂K₂	-1.64	-0.22	-0.18	-1.17	10	N₂P₂K₃	1.57	-0.41	0.02	1.05	5
N₂P₁K₁	4.18	3.16	-0.30	3.15	1	N₃P₂K₂	2.90	-0.65	-1.30	1.83	3
N₂P₁K₂	0.98	-0.97	1.20	0.69	7	N₁P₁K₂	-2.31	-0.82	1.07	-1.58	11
N₂P₂K₂	0.65	1.22	2.42	0.77	6	N₁P₂K₁	-2.60	0.61	-1.57	-1.87	12
N₂P₃K₂	2.49	-0.48	-0.55	1.63	4	N₂P₀K₂	3.47	-1.39	-0.46	2.22	2

材料Materials	Y₁	Y₂	Y₃	Y	排名Ranking	材料Materials	Y₁	Y₂	Y₃	Y	排名Ranking
N₀P₀K₀	-3.51	0.35	-1.37	-2.51	13	N₂P₂K₀	-0.02	-0.60	0.54	-0.03	9
N₀P₂K₂	-7.05	0.48	0.23	-4.80	14	N₂P₂K₁	0.89	-0.28	0.25	0.61	8
N₁P₂K₂	-1.64	-0.22	-0.18	-1.17	10	N₂P₂K₃	1.57	-0.41	0.02	1.05	5
N₂P₁K₁	4.18	3.16	-0.30	3.15	1	N₃P₂K₂	2.90	-0.65	-1.30	1.83	3
N₂P₁K₂	0.98	-0.97	1.20	0.69	7	N₁P₁K₂	-2.31	-0.82	1.07	-1.58	11
N₂P₂K₂	0.65	1.22	2.42	0.77	6	N₁P₂K₁	-2.60	0.61	-1.57	-1.87	12
N₂P₃K₂	2.49	-0.48	-0.55	1.63	4	N₂P₀K₂	3.47	-1.39	-0.46	2.22	2

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