Yield and Forage Quality of the New Forage Perennial Legume Bituminaria bituminosa var. albomarginata cv. Lanza in Response to Rainfall Reduction and Competition
Jesús Fernández-Habas, Daniel Real, Tom Vanwalleghem, José Ramón Leal-Murillo, Pilar Fernández-Rebollo
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引用次数: 0
Abstract
Bituminaria bituminosa is a promising drought-tolerant perennial legume which could reduce the vulnerability of Mediterranean livestock systems to drought. A 3-year field split-plot experiment was carried out in southern Spain to test the response of Bituminaria bituminosa cv. Lanza (tedera) to a 24% annual rainfall reduction and competition in terms of yield and forage quality. The experiment included a whole-plot factor, Rainfall, with two treatments, 24% annual rainfall reduction and no rainfall reduction, and two subplot factors: Species (tedera and alfalfa) and Stand (pure and mixed). In the sowing year, tedera in pure stands was as productive as alfalfa in rainfed conditions (2740 kg ha−1). In the second year, a suitable distribution of rainfall until April and a mild winter allowed production of tedera of 9526 kg ha−1 compared to 1811 kg ha−1 of alfalfa. In the third year, both species had a similar yield of 1843 kg ha−1. Rainfall reduction marginally affected (p < 0.1) the species production. The 24% rainfall reduction had less impact on tedera than management and the contrasting weather over years. In the second year, rainfall reduction caused a decline in the yield of, on average, 36% in alfalfa and 17% in tedera. Contrary to the previous year, in the third year, both species showed a similar increase in yield under reduced rainfall due to a possible protective effect of the rainout shelters in winter. Tedera suffered from frost damage indicating the cold tolerance of cv. Lanza may not be enough to persist in some Mediterranean areas of the Iberian Peninsula. Competition strongly affected both species, leading to failure, especially in tedera, whose establishment may be severely limited by fast-growing grasses. Tedera showed suitable forage quality, especially in the leaf fraction (CP = 16%). However, uncut tedera developed lignified stems that caused a great decline in forage quality. Rainfall reduction had little or no impact on forage quality.
期刊介绍:
The effects of stress on crop production of agricultural cultivated plants will grow to paramount importance in the 21st century, and the Journal of Agronomy and Crop Science aims to assist in understanding these challenges. In this context, stress refers to extreme conditions under which crops and forages grow. The journal publishes original papers and reviews on the general and special science of abiotic plant stress. Specific topics include: drought, including water-use efficiency, such as salinity, alkaline and acidic stress, extreme temperatures since heat, cold and chilling stress limit the cultivation of crops, flooding and oxidative stress, and means of restricting them. Special attention is on research which have the topic of narrowing the yield gap. The Journal will give preference to field research and studies on plant stress highlighting these subsections. Particular regard is given to application-oriented basic research and applied research. The application of the scientific principles of agricultural crop experimentation is an essential prerequisite for the publication. Studies based on field experiments must show that they have been repeated (at least three times) on the same organism or have been conducted on several different varieties.