Magnesium biofortification of Italian ryegrass (Lolium multiflorum L.) via agronomy and breeding as a potential way to reduce grass tetany in grazing ruminants.
Magnesium biofortification of Italian ryegrass (Lolium multiflorum L.) via agronomy and breeding as a potential way to reduce grass tetany in grazing ruminants.
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DOI：
10.1007/s11104-019-04337-x
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发表时间：
2020
期刊：
影响因子：
4.9
通讯作者：
Broadley MR
中科院分区：
文献类型：
--
作者：
Kumssa DB;Lovatt JA;Graham NS;Palmer S;Hayden R;Wilson L;Young SD;Lark RM;Penrose B;Ander EL;Thompson R;Jiang LX;Broadley MR
镁缺乏症是一种严重的代谢紊乱，会影响到放牧的反刍动物。本试验研究了镁肥能否提高多花黑麦草(Lolium multiflorum L.)包括一个品种(cv.Bb2067；‘Magnet’)，繁殖是为了积累更大浓度的镁。在控制环境(CE)条件下，3个品种(cv.Bb2067，cv.Bb2068，cv.在低养分堆肥中以六种肥料水平(0-1500gμM氯化镁2.6H2O)种植。大田条件下，三个品种在CE和cv.阿拉莫种植在两个地点，四个硫酸镁施肥量(0-200亿公斤/公顷−1mGO)。在两年的时间里，进行了多次割草。在所有品种和条件下，牧草镁含量均随镁肥施用量的增加而增加。在田间条件下，在不同施镁量、施镁地点和施镁方式下，Bb2067的牧草镁浓度比其他品种高11-73%，牧草伤寒指数(FTI)较小。牧草干物质(DM)产量。Bb2067显著小于cv(p <； 0.05)。阿拉莫。施镁量对干物质产量的影响不显著(p ≥ 0.05)。通过育种和农艺措施生物强化牧草中的镁可以提高放牧反刍动物的饲料镁浓度，即使在低镁血症最普遍的高生长春草条件下也是如此。对农艺生物强化的反应因品种、镁肥施用量、地点和天气而异。成本：这些方法的效益和农民的接受度，以及对牛羊在用镁生物强化的草上放牧的影响需要进一步调查。本文的在线版本(10.1007/s11104-019-019-x)包含向授权用户提供的补充材料。
Magnesium (Mg) deficiency (known as grass tetany) is a serious metabolic disorder that affects grazing ruminants. We tested whether Mg-fertiliser can increase Mg concentration of Italian ryegrasses (Lolium multiflorum L.) including a cultivar (cv. Bb2067; ‘Magnet’), bred to accumulate larger concentrations of Mg. Under controlled environment (CE) conditions, three cultivars (cv. Bb2067, cv. Bb2068, cv. RvP) were grown in low-nutrient compost at six fertiliser rates (0–1500 μM MgCl2.6H2O). Under field conditions, the three cultivars in the CE condition and cv. Alamo were grown at two sites, and four rates of MgSO4 fertiliser application rates (0–200 kg ha−1 MgO). Multiple grass cuts were taken over two-years. Grass Mg concentration increased with increasing Mg-fertiliser application rates in all cultivars and conditions. Under field conditions, cv. Bb2067 had 11–73% greater grass Mg concentration and smaller forage tetany index (FTI) than other cultivars across the Mg-fertiliser application rates, sites and cuts. Grass dry matter (DM) yield of cv. Bb2067 was significantly (p < 0.05) smaller than cv. Alamo. The effect of Mg-fertiliser rate on DM yield was not significant (p ≥ 0.05). Biofortification of grass with Mg through breeding and agronomy can improve the forage Mg concentration for grazing ruminants, even in high-growth spring grass conditions when hypomagnesaemia is most prevalent. Response to agronomic biofortification varied with cultivar, Mg-fertiliser rate, site and weather. The cost:benefit of these approaches and farmer acceptability, and the impact on cattle and sheep grazing on grasses biofortified with Mg requires further investigation. The online version of this article (10.1007/s11104-019-04337-x) contains supplementary material, which is available to authorized users.
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影响因子：
3.3
作者：
Knowles, S. O.;Grace, N. D.
通讯作者：
Grace, N. D.
影响因子：
5.6
作者：
Capstaff NM;Miller AJ
通讯作者：
Miller AJ
DOI：
10.1080/00288233.1983.10427040
发表时间：
1983-01-01
影响因子：
1.8
作者：
CRUSH, JR
通讯作者：
CRUSH, JR
影响因子：
3.8
作者：
Donald, D;Chapman, SJ;Atkinson, D
通讯作者：
Atkinson, D
DOI：
10.2134/jpa1998.0491
发表时间：
1998-10-01
期刊：
JOURNAL OF PRODUCTION AGRICULTURE
影响因子：
--
作者：
Crawford, RJ;Massie, MD;Mayland, HF
通讯作者：
Mayland, HF