[Objectives] To find out the more suitable substrate for seed germination and seedling growth by comparing the effects of different substrates on seed germination.[Methods] Taking the seeds collected in Nyingchi Lulan...[Objectives] To find out the more suitable substrate for seed germination and seedling growth by comparing the effects of different substrates on seed germination.[Methods] Taking the seeds collected in Nyingchi Lulang area of Tibet as the research object, the germination effects (germination percentage, germination potential, germination index) and seedling growth status (primary root number, secondary root number, main root length, root-shoot ratio, seedling height) were measured and compared.[Results] The germination effect of Piptanthus nepalensis seeds was different in different substrates, and the germination rate, germination potential and germination index of P. nepalensis seeds in vermiculite were better than those in humus soil and perlite;the growth status of seedlings in different substrates was different, the number of primary and secondary roots in vermiculite substrate was significantly larger than that in the other two substrates, and the seedling growth in vermiculite was also better than that in the other two substrates;in comparing the main root length and root-shoot ratio, it was found that the main root length in perlite was longer than that in the other two substrates, and the root-shoot ratio was also higher than that in the other two substrates.[Conclusions] The seed germination effect and seedling growth status of P. nepalensis in different substrates were different, and there were significant differences. Vermiculite substrate had better effect on seed germination and growth, and vermiculite substrate could better promote seed germination and seedling growth. Vermiculite substrate was a good choice for seedling cultivation of P. nepalensis .展开更多
[Objectives] To find the optimal hormone and the optimal hormone concentration for promoting rooting of the fig cuttings through the different hormone treatments for cuttings of Xinjiang early-maturing figs. [Methods]...[Objectives] To find the optimal hormone and the optimal hormone concentration for promoting rooting of the fig cuttings through the different hormone treatments for cuttings of Xinjiang early-maturing figs. [Methods]Taking Xinjiang early-maturing figs of Tibet Agricultural and Animal Husbandry College as mother trees,the semi-lignified branches were cut for cuttage and the rooting status and growth under different hormone concentrations were compared. [Results]Under the different concentrations of IBA,NAA and ABT rooting powder,the rooting rate,average root length,average number of roots,seedling rate,new shoot length and germination rate of cuttings were promoted. Especially,ABT rooting powder at the concentration of 200 mg/L showed the best promotion effect. [Conclusions]It is a good choice to use ABT rooting powder with 200 mg/L concentration in the cultivation of Xinjiang early-maturing fig cuttings.展开更多
In order to provide theoretical basis and technical support for the afforestation and artificial water supply of P.szechuanica in arid areas,the characteristics of water consumption of P.szechuanica were explored,and ...In order to provide theoretical basis and technical support for the afforestation and artificial water supply of P.szechuanica in arid areas,the characteristics of water consumption of P.szechuanica were explored,and the law of water demand of P.szechuanica was grasped.In this paper,potted seedlings of 1-0 rooted cuttings of P.szechuanica were taken as research objects,and change situation of water consumption under different water control gradients was measured regularly by using weighing method,further analyzing dynamic change of water consumption of P.szechuanica and revealing water demand law of 1-0 rooted cuttings of P.szechuanica.The results showed that total change of water consumption of 1-0 rooted cuttings of P.szechuanica had"slow-fast-slow-fast"double-peak trend in the growth period of the current year,and corresponded with univariate linear relation(R^(2)=0.7137),with significant difference.In whole growth period,water consumption in August was the highest,which was 2.7 times of that in June and July and 1.5 times of that after September.In different water control treatments,the dynamic changes of daily and monthly water consumption were significantly different.In seven water control treatments,monthly water consumption was between(6315.95±1690.70)and(10105.28±3065.30)g/month,and mean was(8211.07±2308.23)g/month.With intensification of water control treatment,water consumption increased,but there was no seedling death due to water shortage.P.szechuanica has great plasticity in water demand,and can survive in both arid and humid environments.Meanwhile,it is revealed that P.szechuanica is the most widely distributed tree species in the region.展开更多
文摘[Objectives] To find out the more suitable substrate for seed germination and seedling growth by comparing the effects of different substrates on seed germination.[Methods] Taking the seeds collected in Nyingchi Lulang area of Tibet as the research object, the germination effects (germination percentage, germination potential, germination index) and seedling growth status (primary root number, secondary root number, main root length, root-shoot ratio, seedling height) were measured and compared.[Results] The germination effect of Piptanthus nepalensis seeds was different in different substrates, and the germination rate, germination potential and germination index of P. nepalensis seeds in vermiculite were better than those in humus soil and perlite;the growth status of seedlings in different substrates was different, the number of primary and secondary roots in vermiculite substrate was significantly larger than that in the other two substrates, and the seedling growth in vermiculite was also better than that in the other two substrates;in comparing the main root length and root-shoot ratio, it was found that the main root length in perlite was longer than that in the other two substrates, and the root-shoot ratio was also higher than that in the other two substrates.[Conclusions] The seed germination effect and seedling growth status of P. nepalensis in different substrates were different, and there were significant differences. Vermiculite substrate had better effect on seed germination and growth, and vermiculite substrate could better promote seed germination and seedling growth. Vermiculite substrate was a good choice for seedling cultivation of P. nepalensis .
基金Supported by the Student’s Platform for Innovation and Entrepreneurship Training Program at State Level(20181069317):Study on Breeding and Selection Techniques of Three Fine Fig Varieties
文摘[Objectives] To find the optimal hormone and the optimal hormone concentration for promoting rooting of the fig cuttings through the different hormone treatments for cuttings of Xinjiang early-maturing figs. [Methods]Taking Xinjiang early-maturing figs of Tibet Agricultural and Animal Husbandry College as mother trees,the semi-lignified branches were cut for cuttage and the rooting status and growth under different hormone concentrations were compared. [Results]Under the different concentrations of IBA,NAA and ABT rooting powder,the rooting rate,average root length,average number of roots,seedling rate,new shoot length and germination rate of cuttings were promoted. Especially,ABT rooting powder at the concentration of 200 mg/L showed the best promotion effect. [Conclusions]It is a good choice to use ABT rooting powder with 200 mg/L concentration in the cultivation of Xinjiang early-maturing fig cuttings.
基金Supported by Natural Science Foundation of Tibet Autonomous Region(XZ2019ZRG-58)Forestry Discipline Innovation Team Construction Project of Tibet Agriculture&Animal Husbandry University(Tibet Financial Forecast:2020-001).
文摘In order to provide theoretical basis and technical support for the afforestation and artificial water supply of P.szechuanica in arid areas,the characteristics of water consumption of P.szechuanica were explored,and the law of water demand of P.szechuanica was grasped.In this paper,potted seedlings of 1-0 rooted cuttings of P.szechuanica were taken as research objects,and change situation of water consumption under different water control gradients was measured regularly by using weighing method,further analyzing dynamic change of water consumption of P.szechuanica and revealing water demand law of 1-0 rooted cuttings of P.szechuanica.The results showed that total change of water consumption of 1-0 rooted cuttings of P.szechuanica had"slow-fast-slow-fast"double-peak trend in the growth period of the current year,and corresponded with univariate linear relation(R^(2)=0.7137),with significant difference.In whole growth period,water consumption in August was the highest,which was 2.7 times of that in June and July and 1.5 times of that after September.In different water control treatments,the dynamic changes of daily and monthly water consumption were significantly different.In seven water control treatments,monthly water consumption was between(6315.95±1690.70)and(10105.28±3065.30)g/month,and mean was(8211.07±2308.23)g/month.With intensification of water control treatment,water consumption increased,but there was no seedling death due to water shortage.P.szechuanica has great plasticity in water demand,and can survive in both arid and humid environments.Meanwhile,it is revealed that P.szechuanica is the most widely distributed tree species in the region.
