Seasonal Yield Distribution of Cool‐Season Grasses following Winter Defoliation

Riesterer, Janet L.; Casler, Michael D.; Undersander, D. J.; Combs, D.K.

doi:10.2134/agronj2000.925974x

Cited by 32 publications

(29 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the upper Midwest, Riesterer et al (2000) also found little eff ect of time of winter harvest on subsequent yield except when early spring growth preceded March defoliation, reducing fi rst-cut forage yield. In the upper Midwest, Riesterer et al (2000) also found little eff ect of time of winter harvest on subsequent yield except when early spring growth preceded March defoliation, reducing fi rst-cut forage yield.…”

Section: Month Stagedmentioning

confidence: 93%

Growth and Nutritive Value of Perennial C₃ Grasses in the Southern Great Plains

Coleman¹,

Rao

Volesky

et al. 2010

Crop Science

View full text Add to dashboard Cite

Spring and fall gaps in forage production systems utilizing winter wheat (Triticum aestivum L.) forage in the southern Great Plains have led to an interest in additional resources such as C3 perennial grasses. We evaluated the potential of nine cool‐season perennial grass entries to fill the gap in forage production and nutritive value through the fall and spring seasons over 3 yr in Oklahoma. Yield of dry matter and crude protein (CP), neutral detergent fiber, acid detergent fiber, and in vitro organic matter digestibility (IVOMD) concentrations were regressed on days to determine daily changes. Following excellent growth in the spring of the establishment year, yields in the fall were less and declined markedly in 1997. Spring growth achieved the minimum amount of forage (1100 kg ha−1) for good animal productivity, with most exceeding 2500 kg ha−1 by 1 February in the first 2 yr. In general, nutritive value (CP and IVOMD) declined with maturity, but most entries were adequate through March each year, but seldom exceeded minimum requirements for 1 kg steer gain d−1 When herbage was sequentially removed (staged), subsequent regrowth was not different due to month of staging through March of each year, after which yield was significantly reduced. When fall moisture was adequate for wheat pasture, wheat yield and nutritive value were higher than any perennial grass, but when moisture was limited, yields of wheatgrasses (Thinopyrum spp.) generally exceeded those of wheat.

show abstract

Section: Month Stagedmentioning

confidence: 93%

Growth and Nutritive Value of Perennial C₃ Grasses in the Southern Great Plains

Coleman¹,

Rao

Volesky

et al. 2010

Crop Science

View full text Add to dashboard Cite

show abstract

“…Furthermore, B. inermis is a common grass in pastures and grasslands where it often co‐occurs with S. phoenix (e.g. Riesterer et al . 2000).…”

Section: Methodsmentioning

confidence: 99%

Even after death the endophytic fungus of Schedonorus phoenix reduces the arbuscular mycorrhizas of other plants

Antunes¹,

Miller

Carvalho³

et al. 2008

Functional Ecology

View full text Add to dashboard Cite

Summary 1.Plants can host microbial communities whose integrated functions are often responsible for their success. Understanding mechanisms regulating such functions is thus a major goal in ecology. 2. Fungal endophytes of grasses, particularly of the genus Neotyphodium , have been reported to reduce colonization of their host plant by arbuscular mycorrhizal (AM) fungi. However, it is unclear which mechanism(s) may explain the effects produced by the endophyte and whether these effects are present in nature. 3. We used Schedonorus phoenix (syn. Lolium arundinaceum ) plants that were endophyte-free or infected with one of two strains of Neotyphodium coenophialum known to produce different putative allelochemicals to test the hypotheses that (i) allelopathic effects of the endophyte reduce AM fungal spore germination; and (ii) the allelochemical compound(s) are leached into the soil even after the death of S. phoenix , where they reduce AM fungal colonization of other plants. 4. In a first experiment, aqueous extracts from the shoots of S. phoenix were applied onto spores of the AM fungus Glomus intraradices to test germination effects. Both endophyte strains reduced spore germination by approximately 10% relative to endophyte-free controls. 5. In a second experiment, we placed dried shoot material ('thatch') on the soil surface of pots containing Bromus inermis , which were either inoculated with G. intraradices or not. We watered the plants through the thatch, relying upon leaching to translocate potential allelochemicals to the soil. AM fungal colonization of B. inermis was significantly reduced when thatch was infected with the common strain, but not with AR542, compared to the endophyte-free thatch. Furthermore, the arbuscule : vesicle ratio was 11-fold smaller when thatch was infected with the common strain compared to endophyte-free thatch, suggesting that G. intraradices was stressed by the presence of common strain-leachate. 6. We observed situations whereby two ecologically widespread plant-microbe symbioses interact. Potential mechanisms may include allelopathic effects, although other factors are also possible, and leaching is a mode of entry of putative endophyte-induced AM fungal inhibitors in soil. Understanding these processes is important as they affect AM fungal communities which contribute to plant success and, consequentially, grassland ecosystem dynamics.

show abstract

“…Care must be taken to ensure that both whole-plot factors are randomized independently and differently in each replicate of the experiment, rather than stripping one factor across the entire experiment without rerandomization. Combined use of both strip-plot and traditional split-plot "splits" in one experiment (Riesterer et al, 2000) illustrate both the complexity and versatility available in these randomization restrictions.…”

Section: Blockingmentioning

confidence: 99%

Fundamentals of Experimental Design: Guidelines for Designing Successful Experiments

Casler

2015

Agronomy Journal

Self Cite

View full text Add to dashboard Cite

We often think of experimental designs as analogous to recipes in a cookbook. We look for something that we like, something that satisfies our needs, and frequently return to those that have become our long‐standing favorites. We can easily become complacent, favoring the tried‐and‐true designs (or recipes) over those that contain unknown or untried ingredients or those that are too complex for our tastes and skills. Instead, I prefer to think of experimental designs as a creative series of decisions that are meant to solve one or more problems. These problems may be real or imagined—we may have direct evidence of a past or current problem or we may simply want insurance against future potential problems. The most significant manifestation of a “problem” or a “failed” design is unsatisfactory P values that prevent us from developing inferences about treatment differences. Four basic tenets or pillars of experimental design— replication, randomization, blocking, and size of experimental units— can be used creatively, intelligently, and consciously to solve both real and perceived problems in comparative experiments. Because research is expensive, both in terms of grant funds and the emotional costs invested in grant competition and administration, biological experiments should be designed under the mantra “failure is not an option.” Guidelines and advice provided in this review are designed to reduce the probability of failure for researchers who are willing to question, evaluate, and possibly modify their decision‐making processes.

show abstract

Seasonal Yield Distribution of Cool‐Season Grasses following Winter Defoliation

Cited by 32 publications

References 23 publications

Growth and Nutritive Value of Perennial C₃ Grasses in the Southern Great Plains

Growth and Nutritive Value of Perennial C₃ Grasses in the Southern Great Plains

Even after death the endophytic fungus of Schedonorus phoenix reduces the arbuscular mycorrhizas of other plants

Fundamentals of Experimental Design: Guidelines for Designing Successful Experiments

Contact Info

Product

Resources

About

Seasonal Yield Distribution of Cool‐Season Grasses following Winter Defoliation

Cited by 32 publications

References 23 publications

Growth and Nutritive Value of Perennial C3 Grasses in the Southern Great Plains

Growth and Nutritive Value of Perennial C3 Grasses in the Southern Great Plains

Even after death the endophytic fungus of Schedonorus phoenix reduces the arbuscular mycorrhizas of other plants

Fundamentals of Experimental Design: Guidelines for Designing Successful Experiments

Contact Info

Product

Resources

About

Growth and Nutritive Value of Perennial C₃ Grasses in the Southern Great Plains

Growth and Nutritive Value of Perennial C₃ Grasses in the Southern Great Plains