In order to select the suitable soil for transplanting tobacco in Hunan to- bacco growing areas, pot experiment was conducted to study the effects of different transplanting nutdent soils on the growth and dry matter ...In order to select the suitable soil for transplanting tobacco in Hunan to- bacco growing areas, pot experiment was conducted to study the effects of different transplanting nutdent soils on the growth and dry matter accumulation of tobacco. The results indicated that the treatments of transplanting with nutrition soils were better than the control group. For the underground part, transplanting nutrient soil could effectively improve the root activity of tobacco plants, and increase root volume, root surface area, total root length, as well as the number of root tips and the number of root branches. For the aboveground part, transplanting nutrient soil could remarkably improve the plant height, stem girth, leaf number and maximum leaf area, and could simultaneously significantly increase the dry matter accumulation. By comparison, peat ＋ mushroom residue ＋ saw dust ＋ straw powder ＋ bicchar ＋ root promoting nutrient solution was the most effective treatment, and the effect of sole application of nutrient solution was limited. In conclusion, transplanting with nutrition soil could effectively promote the growth and dry matter accumulation of tobacco.展开更多
Changes in soil nitrogen mineralization can impact nutrient availability,and further affect plant growth.It is unclear,however,how temperature elevation in alpine grassland will affect soil net N mineralization rate(N...Changes in soil nitrogen mineralization can impact nutrient availability,and further affect plant growth.It is unclear,however,how temperature elevation in alpine grassland will affect soil net N mineralization rate(N_(min))across altitudes.At six altitudes(3200-4200 m with an interval of 200 m)along a slope in Lenglong mountain in the northern Qinghai-Tibetan Plateau,we performed an in situ soil incubation experiment by using the resin-core method to assess altitudinal variations of Nnin.Meanwhile,we evaluated the effects of temperature elevation on N_(min)and its temperature sensitivity(Q_(10))through a soil downward transplantation experiment based on three reference baseline altitudes(3800,4000 and 4200 m).The results showed that high altitudes generally led to low values of N_(min).Structural equation modeling analysis revealed that N_(min)along the altitude was mainly controlled by soil temperature.Increased temperature caused by the altitude transplantation significantly elevated N_(min)for all of the three reference altitudes.The value of Q10 was 3.4 for soil samples transplanted from the reference altitude of 4200 m,which was about twice that of the lower reference altitudes of 4000 and 3800 m.展开更多
文摘In order to select the suitable soil for transplanting tobacco in Hunan to- bacco growing areas, pot experiment was conducted to study the effects of different transplanting nutdent soils on the growth and dry matter accumulation of tobacco. The results indicated that the treatments of transplanting with nutrition soils were better than the control group. For the underground part, transplanting nutrient soil could effectively improve the root activity of tobacco plants, and increase root volume, root surface area, total root length, as well as the number of root tips and the number of root branches. For the aboveground part, transplanting nutrient soil could remarkably improve the plant height, stem girth, leaf number and maximum leaf area, and could simultaneously significantly increase the dry matter accumulation. By comparison, peat ＋ mushroom residue ＋ saw dust ＋ straw powder ＋ bicchar ＋ root promoting nutrient solution was the most effective treatment, and the effect of sole application of nutrient solution was limited. In conclusion, transplanting with nutrition soil could effectively promote the growth and dry matter accumulation of tobacco.
基金The Second Tibetan Plateau ScientificExpeditionand Research(STEP)program(2019QZKK0106)the National Natural Science Foundation of China(91837312)Postdoctoral Science Foundation of China(2019M660751).
文摘Changes in soil nitrogen mineralization can impact nutrient availability,and further affect plant growth.It is unclear,however,how temperature elevation in alpine grassland will affect soil net N mineralization rate(N_(min))across altitudes.At six altitudes(3200-4200 m with an interval of 200 m)along a slope in Lenglong mountain in the northern Qinghai-Tibetan Plateau,we performed an in situ soil incubation experiment by using the resin-core method to assess altitudinal variations of Nnin.Meanwhile,we evaluated the effects of temperature elevation on N_(min)and its temperature sensitivity(Q_(10))through a soil downward transplantation experiment based on three reference baseline altitudes(3800,4000 and 4200 m).The results showed that high altitudes generally led to low values of N_(min).Structural equation modeling analysis revealed that N_(min)along the altitude was mainly controlled by soil temperature.Increased temperature caused by the altitude transplantation significantly elevated N_(min)for all of the three reference altitudes.The value of Q10 was 3.4 for soil samples transplanted from the reference altitude of 4200 m,which was about twice that of the lower reference altitudes of 4000 and 3800 m.
