| 氮磷肥对3种牧草的生长效应和氮磷吸收的影响 |
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| 引用本文： | 龙会英,张德,曾丽萍,金杰,何光熊.氮磷肥对3种牧草的生长效应和氮磷吸收的影响[J].草业学报,2019,28(5):171-177. |
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| 作者姓名： | 龙会英 张德 曾丽萍 金杰 何光熊 |
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| 作者单位： | 1.云南省农业科学院热区生态农业研究所,云南 元谋 651300; 2.元谋干热河谷植物园,云南 元谋 651300; 3.红河学院,云南 蒙自 651199 |
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| 基金项目： | 国家自然科学基金地区基金项目(41361099),云南省科学技术厅云南省技术创新人才培养项目(2011CI066)和依托项目:云南省农业科学院热区生态农业研究所科技计划项目(RQS 2006-1,RQS 2008-1)资助 |
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| 摘 要： | 采用田间试验,单因素随机区组排列,以豆科牧草柱花草和禾本科牧草扭黄茅和孔颖草为试验材料,研究适量氮磷肥的施用对3种牧草旺盛期生长及土壤氮磷吸收的影响和效果。试验结果表明,与未施氮磷肥比较,氮磷的施用有利柱花草、扭黄茅和孔颖草旺盛期(7-9月)的生长,3种牧草物候期有所延迟,可以提高3种牧草旺盛期绝对生长量,显著增加了孔颖草总生物量和氮吸收量(P<0.05)。与未施氮肥对比,施氮(施纯氮120 kg·hm-2)有利柱花草和孔颖草对氮的吸收,显著提高柱花草含氮量和孔颖草氮的吸收量(P<0.05),促进柱花草和孔颖草的生长,提高柱花草和孔颖草地上部和地下部生物量,提高扭黄茅地上部的生长量和生物量。与未施磷肥对比,施磷(施纯磷75 kg·hm-2)显著提高孔颖草氮的吸收量(P<0.05)。本研究为3种牧草和其他牧草氮磷的施用提供理论依据,即:适量的氮磷施用有利3种牧草产量的提高。
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| 关 键 词： | 氮 磷 3种牧草 生长 吸收 |
| 收稿时间： | 2019-01-03 |
| 修稿时间： | 2019-03-04 |
Herbage accumulation,and nitrogen and phosphorus absorption responses of three forage species following addition of nitrogen and phosphorus fertilizer |
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| LONG Hui-ying,ZHANG De,ZENG Li-ping,JIN Jie,HE Guang-xiong.Herbage accumulation,and nitrogen and phosphorus absorption responses of three forage species following addition of nitrogen and phosphorus fertilizer[J].Acta Prataculturae Sinica,2019,28(5):171-177. |
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| Authors: | LONG Hui-ying ZHANG De ZENG Li-ping JIN Jie HE Guang-xiong |
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| Institution: | 1.Institute of Tropical Eco-agricultural Sciences, Yunnan Academy of Agriculture Sciences, Yuanmou 651300, China; 2.Yuanmou Dry-Hot Valley Botancal Garden, Yuanmou 651300, China; 3.Honghe University, Mengzi 651199, China |
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| Abstract: | Herbage drymatter accumulation, and nitrogen and phosphorus absorption responses of three forage species following addition of nitrogen as urea (N) or phosphorus as superphosphate (P) fertilizer were studied over 2 seasons (2015 and 2016), in a field experiment with a randomized block design. The leguminous forage, Stylosanthes guianensis cv. Seabrana, and the forage grasses black spear grass (Heteropogon contortus) and ‘kong ying' grass (Bothriochloa pertusa) were compared with nil-fertilizer and N or P fertilizer treatments. In general, fertilizer application (especially N) delayed crop phenological development by 5-10 days. Averaged over the two growing seasons, addition of either N or P fertilizer increased forage yield by approximately 11%, but data were variable, and the yield, except B. pertusa responses to N and P were not statistically significant. Crop N and P yields (kg·ha-1) of S. guianensis were almost double those of the two grasses tested, but only in the case of N addition to B. pertusa, was there a significant fertilizer-induced increase in forage N or P yield. Root mass of H. contortus was reduced by N or P fertilizer (P<0.05), especially by N addition. This study has provided a theoretical basis for planning the application of nitrogen and phosphorus in sub-tropical forage production. In this article, proper application of nitrogen and phosphorus is beneficial to increase the yield of the three herbages. |
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| Keywords: | nitrogen phosphorus three pasture growth absorption |
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