effect of row spacing in competition of cotton with velvetleaf on crop growth

نویسندگان

اسماعیل قربانپور

کارشناس ارشد، گروه زراعت، دانشکدۀ تولیدات گیاهی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان فرشید قادری فر

استادیار، گروه زراعت، دانشکدۀ تولیدات گیاهی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان جاوید قرخلو

استادیار، گروه زراعت، دانشکدۀ تولیدات گیاهی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان

چکیده

to evaluate the competition effect of velvetleaf on cotton, an experiment was conducted in a completelyrandomized block design with split plot arrangement of treatments with three replications at experimentalstation of gorgan university of agricultural sciences and natural resources during 2011 growingseason. the treatments were three row spacing (20, 40 and 80cm) of cotton (as main plot) and fivedensities (0 (control), 1, 3, 5 and 12 plant per m-2) of velvetleaf (as subplot). the highest cotton height(129.4 cm) was obtained in 80 cm cotton row spacing and weed free condition. also, maximum cottondry matter (863.8 g m-2) and leaf area index (9.04) was achieved in the plot of 20cm cotton row spacingand weed free condition. results indicated that row spacing had no significant effect on cotton yieldunder weed free condition. the highest yield (4986.73 kg ha-1) was obtained in 40 cm cotton row spacingand weed free condition. however, results showed that in ultra narrow row, increasing the plant densitylead to increase of the crop ability to resource using in compared with weed and have producedsustainable yield in competition with over weed density in compared with conventional row.

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عنوان ژورنال:
به زراعی کشاورزی

جلد ۱۶، شماره ۱، صفحات ۹۹-۱۱۰

کلمات کلیدی
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