Science Links Japan | Relationship between plant surviving after spring and seminal root penetration into soil at thaw in spring wheat seeded in early winter.

Relationship between plant surviving after spring and seminal root penetration into soil at thaw in spring wheat seeded in early winter.

Accession number;07A0044321

Title;Relationship between plant surviving after spring and seminal root penetration into soil at thaw in spring wheat seeded in early winter.

Author; TSUJI HIROYUKI (National Agricultural Res. Organization (NARO), JPN) OSHITA YASUO (National Agricultural Res. Organization (NARO), JPN) KIMIWADA KENJI (National Agricultural Res. Organization (NARO), JPN) WATANABE JIRO (National Agricultural Res. Organization (NARO), JPN)

Journal Title;Root Research

Journal Code:L2698A

ISSN:0919-2182

VOL.15;NO.4;PAGE.141-148(2006)

Figure&Table&Reference;FIG.3, TBL.6, REF.9

Pub. Country;Japan

Language;Japanese

Abstract;This study was undertaken to investigate an effect of soilcovering on survival rate of spring wheat (Triticum spp. Cv. Haruyokoi) which were sown with a broadcaster in early winter. Effects of seed position (below or at soil surface) and the number of seminal roots penetrating into soil at thawing period on survival rate and yields were also investigated. The field experiment was conducted in 2003 and 2004 at the National Agriculture Research Center for Hokkaido Region. The laboratory experiment additionally investigated the effects of soil moisture (drought or wet) and root penetration into the soil on the survival rate of wheat plants in a growth chamber. In the field trial, the survival rate of the seedlings that sprouted from soil was over 90% in both years. The survival rate of the seedlings that sprouted at the soil surface were generally low, but ones that had more than two seminal roots penetrating into the soil survived better (76-90%). Yields of these plants were nearly equal to that of the plants sprouted from soil. In the laboratory experiments, drought treatment decreased not only the number of the roots that penetrated into the soil but also the survival rate of the wheat plant. These results suggested that the increasing in number of seminal roots that elongates under snow cover and roots that penetrates into the soil will decrease seedling death and increase yield of wheat that sprouted at the soil surface. Furthermore covering the seeds with soil will also increase and stabilize yield of spring wheat seeded in early winter. (author abst.)

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