نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکترای گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه تهران، کرج،
2 دکترای گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه تهران، کرج
3 پردیس کشاورزی و منابع طبیعی دانشگاه تهران
4 استاد گروه زراعت و اصلاح نباتات دانشگاه تهران
5 استاد گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه تهران، کرج،
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Keeping and returning plant residues to the soil not only improves the physical and chemical structure of the soil, but the presence of chemical compounds of the residues can also reduce the germination and growth of weeds. In this regard, a factorial experiment based on randomized complete blocks design with three replications was conducted at the experimental greenhouse of agricultural research station of the college of agriculture and natural resources, university of Tehran in 2019-2020. Treatments include three levels of plant residues (no-residues, residues of Brassica napus and Hordeum vulgare), two types of soil (no-sterile and sterile), three levels of soil temperature (25, 35 and 45oc) and two types of weed (Amaranthus retroflexus and Hordeum spontaneum). By increasing the temperature from 25 to 45oc, the final emergence percentage and emergence rate of weed seedling in the no-residues increased and in the treatments with Brassica and Hordeum residues decreased. In both sterile and no-sterile soils, the highest final emergence percentage (76.1 and 66.1%) and emergence rate of weed seedling (0.12 and 0.11 inverse time in 50% seedling emergence) were observed in the no-residues. Also in sterile soil, the mentioned treatment was very different from the treatments of Brassica and Hordeum residues. Although the allelopathic effect of Brassica napus to controlling the emergence of the Hordeum spontaneum and Amaranthus retroflexus compared to Hordeum vulgare was grater, however, both crops were able to disrupt the germination of the weeds.
کلیدواژه‌ها [English]
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