This study was to understand the physiological changes of four kinds of crop seeds including baby corn, cowpea, radish and rape- seed, under the treatment of ultra-drying. Large amounts of seeds as experimental materi...This study was to understand the physiological changes of four kinds of crop seeds including baby corn, cowpea, radish and rape- seed, under the treatment of ultra-drying. Large amounts of seeds as experimental materials （ 10 kg for each material） were respectively dried to the suitable water content consistent with the ultra-dried seed criterion via heating at 50 ~C; then the physiological indices of these ultra-dried seeds such as water content, seed germination, dehydrogenase activity and SOD activity were measured. The results showed that except cowpea seeds, whose ultra-drying treatment should be controlled between two and four days, other three kinds of seeds were tolerant to high tem- perature and low water content. The ultra-dried seeds assumed similar or even higher activities than CKs, but showed no damage symptom. Our result proves that ultra-drying treatment via heating at 50 ℃ is safe and efficient to experimental seeds.展开更多
The sandy soils of Mostaganem plateau are vety, poor in clay. They are characterized by very low fertility and water holding capacity. The addition of bentonite to these soils and the cultivation of durum wheat, in co...The sandy soils of Mostaganem plateau are vety, poor in clay. They are characterized by very low fertility and water holding capacity. The addition of bentonite to these soils and the cultivation of durum wheat, in combination with the chickpeas, are two eco-physiological strategies to rehabilitate their agricultural suitability. This study was conducted on two plant species： a local variety of durum wheat （Waha） and a legume, chickpea （variety ILC 3279）, on a substrate bentonite at 10% dose. For each stage of growth measurements of stem height, leaf area and plants vegetative nitrogen content were quantified. Changes in total nitrogen content of durum wheat grown in substrates amended with 10% bentonite or not during the development of durum wheat in monoculture and in association with the chickpeas were analyzed. The results showed that the total nitrogen content of durum wheat was significantly higher at three leaves and tailoring stages, when durum wheat was associated with chickpea in the same soil. However, the results showed no difference during the lifting and two leaves stages. There was also a positive effect of treatment at 10% of bentonite on the plant total nitrogen content regardless of the stage and the culture system.展开更多
文摘This study was to understand the physiological changes of four kinds of crop seeds including baby corn, cowpea, radish and rape- seed, under the treatment of ultra-drying. Large amounts of seeds as experimental materials （ 10 kg for each material） were respectively dried to the suitable water content consistent with the ultra-dried seed criterion via heating at 50 ~C; then the physiological indices of these ultra-dried seeds such as water content, seed germination, dehydrogenase activity and SOD activity were measured. The results showed that except cowpea seeds, whose ultra-drying treatment should be controlled between two and four days, other three kinds of seeds were tolerant to high tem- perature and low water content. The ultra-dried seeds assumed similar or even higher activities than CKs, but showed no damage symptom. Our result proves that ultra-drying treatment via heating at 50 ℃ is safe and efficient to experimental seeds.
文摘The sandy soils of Mostaganem plateau are vety, poor in clay. They are characterized by very low fertility and water holding capacity. The addition of bentonite to these soils and the cultivation of durum wheat, in combination with the chickpeas, are two eco-physiological strategies to rehabilitate their agricultural suitability. This study was conducted on two plant species： a local variety of durum wheat （Waha） and a legume, chickpea （variety ILC 3279）, on a substrate bentonite at 10% dose. For each stage of growth measurements of stem height, leaf area and plants vegetative nitrogen content were quantified. Changes in total nitrogen content of durum wheat grown in substrates amended with 10% bentonite or not during the development of durum wheat in monoculture and in association with the chickpeas were analyzed. The results showed that the total nitrogen content of durum wheat was significantly higher at three leaves and tailoring stages, when durum wheat was associated with chickpea in the same soil. However, the results showed no difference during the lifting and two leaves stages. There was also a positive effect of treatment at 10% of bentonite on the plant total nitrogen content regardless of the stage and the culture system.
