Boron-amended water and soil - Response

被引:4
作者
Banuelos, GS
Mackey, B
Cook, C
Akohoue, S
Zambrzuski, S
Samra, P
机构
[1] USDA ARS, PWA, OFF AREA DIRECTOR, ALBANY, CA 94710 USA
[2] USDA ARS, SPA, WESLACO, TX 78596 USA
关键词
D O I
10.2135/cropsci1996.0011183X003600010028x
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Well and drainage water with high B concentrations may be an alternative source of water for irrigated agriculture in the western USA. Irrigation water with even moderate levels of B may, however, be toxic to plants. Two greenhouse studies were conducted to evaluate the growth responses of kenaf (Hibiscus cannabinus L.) and cotton (Gossypium hirsutum L.) to B-amended irrigation water (Experiment I) and B-amended soils (Experiment II) irrigated with B-free cater. In Experiment I, both kenaf and cotton were irrigated with water amended with 7.5 mg B L(-1) as boric acid or with water containing <0.25 mg B L(-1). In Experiment II, B uptake and B tolerance were evaluated for kenaf and cotton grown at two different times in B-amended soils (approximate to 45 mg total B kg(-1) soil and 7 mg extractable B L(-1)). In Experiment I, dry matter (DM) yield of both species was significantly reduced by B-amended water (P < 0.05 level). Compared with plants irrigated with control water, total DM yields were 50 and 30% lower for kenaf and cotton, respectively. Leaf tissue B concentrations ranged from 500 to 1400 mg B kg(-1) DM for kenaf and from 300 to 800 mg B kg(-1) DM for cotton. In Experiment II, growing kenaf and cotton in B-amended soils reduced DM yield of kenaf and cotton 27 and 17%, respectively. Mean leaf tissue B concentrations were 422 mg B kg(-1) DM in kenaf and 222 mg B kg(-1) DM in cotton. Results show that high soil B in greenhouse pot conditions decrease DM production of kenaf and cotton.
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页码:158 / 164
页数:7
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