Seed Production of Russian Wildrye 1

Synopsis Burning of the straw and stubble after harvest was beneficial in maintaining high seed yields of intermediate wheatgrass. Mechanical removal of every other foot of vegetation in the row produced seed yields equal to burning. The effects of burning and mechanical thinning appeared to be additive. Increasing the rate of nitrogen was not effective in maintaining seed production as the stands became older.

Section: Literature Reviewmentioning

confidence: 72%

Section: Literature Reviewmentioning

confidence: 99%

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Influence of Cultural Treatments on Seed Production of Intermediate Wheatgrass (Agropyron intermedium (Host) Beauv.)¹

Canode¹

1965

“…In addition, the ridge-furrow effect of cultivated grass rows caused a considerable amount of snow to be trapped within the grass row area. Therefore, retention and infiltration of snowmelt and precipitation may be one of the primary reasons for the high forage and seed yield levels maintained in this study as compared with those of Stitt (13) and Lawrence and Heinrichs (7) for similar climactic conditions.…”

Section: Seed Yieldsmentioning

confidence: 56%

Row Spacing and Fertilization Influences on Forage and Seed Yields of Intermediate Wheatgrass, Russian Wildrye, and Green Needlegrass on Dryland¹

Black¹,

Reitz

1969

The effects of contour row spacings of 76, 107, and 152 cm and N and N‐P fertilization on forage and seed production of intermediate wheatgrass (Agropyron intermedium [Host] Beauv.), Russian wildrye (Elymus junceus Fisch.), and green needlegrass (Stipa viridula Trin.) were evaluated over a 5‐year period. With 45 or 67 kg/ha of N applied annually, forage and seed yields of all species increased 1.5‐ to 2.0‐fold regardless of row spacing, independent of added P. The need for N and N‐P fertilization increased with age of stand regardless of row spacing. Without N or N‐P fertilization, row spacings had no significant influence on forage or seed production of intermediate wheatgrass or Russian wildrye. Forage and seed yields of green needlegrass decreased progressively as row spacing increased regardless of N or N‐P fertilization. Nitrogen recoveries by the three grasses ranged from about 20 to over 50%. In general, N fertilizer recovery was highest from plots with the highest yields and greatest water‐use efficiencies. Russian wildrye grown in 76‐ or 107‐cm rows recovered more than 50% of the N fertilizer applied. Considering all factors involved—forage and seed yields, water‐use efficiencies, and plant N and P uptake—intermediate wheatgrass, Russian wildrye, and green needlegrass should be grown in 107‐ 76‐, and 76‐cm row spacings, respectively, with annual applications of 40 to 60 kg/ha of N with P added.

“…Stitt (8) found that increasing rates of N markedly increased yield and that yield could be maintained for several years with high N fertilization. Studies by Stelfox cl al.…”

Section: Literature Reviewmentioning

confidence: 99%

Seed and Forage Production of Irrigated Russian Wildrye as Influenced by Time and Rate of Nitrogen Fertilization¹

Rogler¹,

Lorenz²

1964

Synopsis Significant increases in seed and forage aftermath yields of Russian wildrye were obtained from annual applications of 50, 100, and 200 pounds of N per acre. Average yields of both seed and forage were increased by each added increment of N. As stands became older the application of N sustained both seed and forage yields at a much higher level than no N. There were no significant differences in seed and forage yields between single and split applications of N and no yield response to P.