[Objective] The aim was to screen out high-quality, high-yield and salt-tol- erant rapeseed varieties suitable for cultivating in saline soils. [Method] Comparison test of rapeseed variety was conducted on Jiangsu coa...[Objective] The aim was to screen out high-quality, high-yield and salt-tol- erant rapeseed varieties suitable for cultivating in saline soils. [Method] Comparison test of rapeseed variety was conducted on Jiangsu coastal beach during 2013- 2014, involving overwintering traits, biological characters, yield components and ion content under moderate saline soil environment. [Result] Suxinyou series varieties had strong growth potential and more branches in saline soils, and yield was significantly higher than that of the rest; K＋ content in root, stem and leaf of Suxinyou 141 and Suxinyou 703 were significantly higher; Na＋ and Cl- contents in root, stem and leaf of Suxinyiu 141 were significantly higher. [Conclusion] Suxinyou series vari- eties are salt tolerant and suitable for growth in saline soil, especially for Suxinyou 141.展开更多
The effects of different concentrations of photosynthetic bacteria solutions （CK, 0 ml photosynthetic bacteria agent＋4 000 ml nutrient solution; T1, 200 ml pho- tosynthetic bacteria agent＋3 800 ml nutrient solution...The effects of different concentrations of photosynthetic bacteria solutions （CK, 0 ml photosynthetic bacteria agent＋4 000 ml nutrient solution; T1, 200 ml pho- tosynthetic bacteria agent＋3 800 ml nutrient solution; T2, 400 ml photosynthetic bacteria agent＋3 600 ml nutrient solution; T3, 600 ml photosynthetic bacteria agent＋ 3 400 ml nutrient solution; T4, 800 ml photosynthetic bacteria agent＋3 200 ml nutrient solution; and T5, 1 000 ml photosynthetic bacteria agent＋3 000 ml nutrient solu- tion） on the leaf number, fresh mass, root vigor, vitamin C content, soluble sugar content, soluble protein content and nitrate content of hydroponic Lactuca sativa L. were investigated. The results showed that the leaf number was increased by 62.66%, the fresh mass was increased by 139.7%, the root vigor was increased by 132.04%, the vitamin C content was increased by 18.34%, the soluble protein content was increased by 16.60%, the soluble sugar content was increased by 192.37%, and the nitrate content was reduced by 69.44% in the T3 group com- pared with those in the control group. The photosynthetic bacteria solution in the T3 group reduced the content of nitrate and improved the yield and quality of hydroponic L. sativa.展开更多
Overabundant and unbalanced input of nutritional elements to soil has a negative effect to the yield and quality of lettuce. Accumulation of nitrates and harmful effects of the chloride ion are the reasons why there i...Overabundant and unbalanced input of nutritional elements to soil has a negative effect to the yield and quality of lettuce. Accumulation of nitrates and harmful effects of the chloride ion are the reasons why there is a need to establish an optimal quantity and relation of nutrients in lettuce nourishment. In the experiment which was carried out during years 2010 and 2011 on the farm of Secondary Agricultural Boarding School in Futog, nitrate content in a fresh mass of lettuce （mg NO3/kg） was obesrved, in dependence on applied compound fertilizers produced by different technologies at different quantities of nitrate and potassium fertilizers. The results of the research show that in a technological ripeness, the highest average lettuce yield has been obtained in the treatment where the highest dosage of nitrate fertilizers was used in spring, in a combination with complex fertilizers in autumn. The lowest average yield has been obtained on the control plot. The highest average nitrate concentration in a fresh lettuce mass has been recorded in using technology of applying mixed fertilizers and the smallest in using a technology of complex fertilizers. At the moment of harvest, the highest nitrogen content in a dry mass of a plant has been recorded when complex fertilizers of phosphorus and potassium were used by the technology of mixed fertilizers.展开更多
[Objective] The aim was to discuss the effects of probiotics on the growth of Cyprinus carpiod and water quality. [Method] Taking C. carpiod as the research object, probiotics were supplemented in the fodder and water...[Objective] The aim was to discuss the effects of probiotics on the growth of Cyprinus carpiod and water quality. [Method] Taking C. carpiod as the research object, probiotics were supplemented in the fodder and water to study their effects on the growth of C. carpiod and water quality. [Result] Probiotics had promoting effects on the growth of C. carpiod and its optimum dosage was 6%. pH, ammonia nitrogen content and nitrite content in water body in experimental groups were all lower than those in control group. [Conclusion] Compound probiotics had a broad application foreground in the aquatic breeding industry.展开更多
Salt and low temperature were both very important factors for soybean production. It was necessary to improve the salt stress and low-temperature tolerance of soybean. The main purpose of this paper was to map the qua...Salt and low temperature were both very important factors for soybean production. It was necessary to improve the salt stress and low-temperature tolerance of soybean. The main purpose of this paper was to map the quantitative trait loci(QTL) related with salt tolerance and low- temperature tolerance at germination stage with backcross introgression lines(BILs),and analyze the genetic overlap between them. There were 22 QTL located with BC2 F4 introgression populations after salt stress,and 15 QTL were mapped after low-temperature stress. Seven overlapping QTLs between salt tolerance and low-temperature tolerance were detected on 6 linkage groups at germination stage. In total,there were 31.81 % of salt tolerance and low-temperature tolerance loci existed genetic overlap.展开更多
The aim of this experimental work is to select wheat progenies tolerant high levels of salinity. Studies were conducted to determine the realized response in salt tolerance of some selected progeny （F3） through one ...The aim of this experimental work is to select wheat progenies tolerant high levels of salinity. Studies were conducted to determine the realized response in salt tolerance of some selected progeny （F3） through one cycle of screening and selection and the extent of variability for salt tolerance among selected progeny （F3） of wheat. All the selected progeny （F3） derived from （F2） populations after exposure are to high salinity level, were tested for salt tolerance during all growth stages in sand cultures salinized with 0, 100, 175 mM NaCI as compared with the unselected progeny （F2）. Results showed that the selected progeny （F3） were in all cases except one, superior in yield at maturity and in most cases significantly so, both at 100 and 175 mM NaCl, to the yield of the unselected progeny （F2） controls. In this study, some selected progeny exhibited more than twice the seed yield compared with that obtained from unselected progeny at 175 mM NaCl, and their seed yield was also significantly higher than that at 0 mM NaCl. Results also indicated that the highest value percentage of realized response in salt tolerance was in （F3AS1） and （F3AS2） at 175 mM NaCI. It is important to bear in mind that the significant improvement in selected progeny was achieved just in a single cycle of selection. There is then a strong possibility that further increases in tolerance may be obtained through further cycles of selection till reaching F6 or F7 where would show genetics stability.展开更多
Soil salinity has been considered a brutal environmental factor for decreasing crop yield due to the accumulation of excessive sodium salts in soil under arid and semi-arid region of the world. This study tries to add...Soil salinity has been considered a brutal environmental factor for decreasing crop yield due to the accumulation of excessive sodium salts in soil under arid and semi-arid region of the world. This study tries to address the potential use of biochar. An organic matter rich material, used to reclaim salt-stressed soil in order to enhance crop production in dry croplands as well as to increase soil organic carbon （SOC） and to improve soil fertility. In this regard, a field experiment for two years was conducted in a moderately salt-stressed soil of Central China with wheat-maize cropping system. The soil was amended with biochar composted with poultry manure （BPC） at 12 t/ha with diluted pyroligneous solution （PS） at 0.15 t/ha a week before sowing of crop. Results showed significant improvement in soil physical properties, soil nutrient content with reduction of sodium salts and soil pH by amendment of BPC-PS1 and BPC-PS2 over the experimental control salt-stressed cropland. Furthermore, wheat and maize grain yield, nitrogen, phosphorous potassium and K/Na ratio increased while sodium decreased with the application of BPC-PS amendment in wheat and maize grain. This study concluded that the biochar amendment in conjunction with PS greatly improved SOC storage, crop nutrient uptake and soil fertility. Thus, waste treatment of crop straw and poultry manure compost as biochar could be combined to alleviate salt stress and improve crop production in the vast area of arid and semi-arid regions of the world.展开更多
Gracilaria tenuistipitata varliui Zhang el Xia is cultivated at two different salinities (21, 33) in the laboratory for 4 weeks. The daily growth rate is determined. The total agar yield and fractional agar compositio...Gracilaria tenuistipitata varliui Zhang el Xia is cultivated at two different salinities (21, 33) in the laboratory for 4 weeks. The daily growth rate is determined. The total agar yield and fractional agar composition are analyzed. Results show that algae grow faster in low salinity. The total agar yield is higher under high salinity conditions than under low salinity conditions. Among the eight fractions extracted, the yields of cold water extract and 40% ethanol extract are about the highest In low salinities the yields of autoclaved extract and 60% ethanol extract are higher, while the yield of cold water extract is lower relative to high salinities.展开更多
Salinity of soils or water poses an increasing threat to food production due to climate change. Plant breeding programs were applied to improve salt tolerance in new wheat genotypes to overcome this problem. The aim o...Salinity of soils or water poses an increasing threat to food production due to climate change. Plant breeding programs were applied to improve salt tolerance in new wheat genotypes to overcome this problem. The aim of this research work is to estimate the realized improvement in salt tolerance of the selected genotypes through plant breeding programs. The comparison experiments were conducted in salinized soils at two locations for two years as compared with two local cultivars. All the selected genotypes derived from F2 populations after six cycles of exposure to high salinity level were tested for salt tolerance during all growth stage. At harvest stage, seed yield and its components were studied for the comparison. Results showed that there were significant differences between all selected genotypes and local eultivars in their overall sensitivities to soil salinity. All selected genotypes were superior in seed yield and its components at maturity to those of the local cultivars at the two location and years. Clearly, all the selected genotypes exhibited more than twice seed yield/m2 compared with that obtained from local cultivars. The results also indicated that there were differences among selected genotypes in their responses to soil salinity between locations and years, but not significant. Important thing is significant improvement in selected genotypes was achieved in their salt tolerance through six cycles of screening and selection to high salinity level. The conclusion is a strong possibility to improve salt tolerant genotypes of wheat with high salt tolerance through plant breeding programs.展开更多
基金Supported by Agricultural Science and Technology Self-innovation Program[CX(13)2031]~~
文摘[Objective] The aim was to screen out high-quality, high-yield and salt-tol- erant rapeseed varieties suitable for cultivating in saline soils. [Method] Comparison test of rapeseed variety was conducted on Jiangsu coastal beach during 2013- 2014, involving overwintering traits, biological characters, yield components and ion content under moderate saline soil environment. [Result] Suxinyou series varieties had strong growth potential and more branches in saline soils, and yield was significantly higher than that of the rest; K＋ content in root, stem and leaf of Suxinyou 141 and Suxinyou 703 were significantly higher; Na＋ and Cl- contents in root, stem and leaf of Suxinyiu 141 were significantly higher. [Conclusion] Suxinyou series vari- eties are salt tolerant and suitable for growth in saline soil, especially for Suxinyou 141.
文摘The effects of different concentrations of photosynthetic bacteria solutions （CK, 0 ml photosynthetic bacteria agent＋4 000 ml nutrient solution; T1, 200 ml pho- tosynthetic bacteria agent＋3 800 ml nutrient solution; T2, 400 ml photosynthetic bacteria agent＋3 600 ml nutrient solution; T3, 600 ml photosynthetic bacteria agent＋ 3 400 ml nutrient solution; T4, 800 ml photosynthetic bacteria agent＋3 200 ml nutrient solution; and T5, 1 000 ml photosynthetic bacteria agent＋3 000 ml nutrient solu- tion） on the leaf number, fresh mass, root vigor, vitamin C content, soluble sugar content, soluble protein content and nitrate content of hydroponic Lactuca sativa L. were investigated. The results showed that the leaf number was increased by 62.66%, the fresh mass was increased by 139.7%, the root vigor was increased by 132.04%, the vitamin C content was increased by 18.34%, the soluble protein content was increased by 16.60%, the soluble sugar content was increased by 192.37%, and the nitrate content was reduced by 69.44% in the T3 group com- pared with those in the control group. The photosynthetic bacteria solution in the T3 group reduced the content of nitrate and improved the yield and quality of hydroponic L. sativa.
文摘Overabundant and unbalanced input of nutritional elements to soil has a negative effect to the yield and quality of lettuce. Accumulation of nitrates and harmful effects of the chloride ion are the reasons why there is a need to establish an optimal quantity and relation of nutrients in lettuce nourishment. In the experiment which was carried out during years 2010 and 2011 on the farm of Secondary Agricultural Boarding School in Futog, nitrate content in a fresh mass of lettuce （mg NO3/kg） was obesrved, in dependence on applied compound fertilizers produced by different technologies at different quantities of nitrate and potassium fertilizers. The results of the research show that in a technological ripeness, the highest average lettuce yield has been obtained in the treatment where the highest dosage of nitrate fertilizers was used in spring, in a combination with complex fertilizers in autumn. The lowest average yield has been obtained on the control plot. The highest average nitrate concentration in a fresh lettuce mass has been recorded in using technology of applying mixed fertilizers and the smallest in using a technology of complex fertilizers. At the moment of harvest, the highest nitrogen content in a dry mass of a plant has been recorded when complex fertilizers of phosphorus and potassium were used by the technology of mixed fertilizers.
基金Supported by the Project of Quality Safety of Agricultural Products Loaned from World Bank of Jilin Province
文摘[Objective] The aim was to discuss the effects of probiotics on the growth of Cyprinus carpiod and water quality. [Method] Taking C. carpiod as the research object, probiotics were supplemented in the fodder and water to study their effects on the growth of C. carpiod and water quality. [Result] Probiotics had promoting effects on the growth of C. carpiod and its optimum dosage was 6%. pH, ammonia nitrogen content and nitrite content in water body in experimental groups were all lower than those in control group. [Conclusion] Compound probiotics had a broad application foreground in the aquatic breeding industry.
文摘Salt and low temperature were both very important factors for soybean production. It was necessary to improve the salt stress and low-temperature tolerance of soybean. The main purpose of this paper was to map the quantitative trait loci(QTL) related with salt tolerance and low- temperature tolerance at germination stage with backcross introgression lines(BILs),and analyze the genetic overlap between them. There were 22 QTL located with BC2 F4 introgression populations after salt stress,and 15 QTL were mapped after low-temperature stress. Seven overlapping QTLs between salt tolerance and low-temperature tolerance were detected on 6 linkage groups at germination stage. In total,there were 31.81 % of salt tolerance and low-temperature tolerance loci existed genetic overlap.
文摘The aim of this experimental work is to select wheat progenies tolerant high levels of salinity. Studies were conducted to determine the realized response in salt tolerance of some selected progeny （F3） through one cycle of screening and selection and the extent of variability for salt tolerance among selected progeny （F3） of wheat. All the selected progeny （F3） derived from （F2） populations after exposure are to high salinity level, were tested for salt tolerance during all growth stages in sand cultures salinized with 0, 100, 175 mM NaCI as compared with the unselected progeny （F2）. Results showed that the selected progeny （F3） were in all cases except one, superior in yield at maturity and in most cases significantly so, both at 100 and 175 mM NaCl, to the yield of the unselected progeny （F2） controls. In this study, some selected progeny exhibited more than twice the seed yield compared with that obtained from unselected progeny at 175 mM NaCl, and their seed yield was also significantly higher than that at 0 mM NaCl. Results also indicated that the highest value percentage of realized response in salt tolerance was in （F3AS1） and （F3AS2） at 175 mM NaCI. It is important to bear in mind that the significant improvement in selected progeny was achieved just in a single cycle of selection. There is then a strong possibility that further increases in tolerance may be obtained through further cycles of selection till reaching F6 or F7 where would show genetics stability.
文摘Soil salinity has been considered a brutal environmental factor for decreasing crop yield due to the accumulation of excessive sodium salts in soil under arid and semi-arid region of the world. This study tries to address the potential use of biochar. An organic matter rich material, used to reclaim salt-stressed soil in order to enhance crop production in dry croplands as well as to increase soil organic carbon （SOC） and to improve soil fertility. In this regard, a field experiment for two years was conducted in a moderately salt-stressed soil of Central China with wheat-maize cropping system. The soil was amended with biochar composted with poultry manure （BPC） at 12 t/ha with diluted pyroligneous solution （PS） at 0.15 t/ha a week before sowing of crop. Results showed significant improvement in soil physical properties, soil nutrient content with reduction of sodium salts and soil pH by amendment of BPC-PS1 and BPC-PS2 over the experimental control salt-stressed cropland. Furthermore, wheat and maize grain yield, nitrogen, phosphorous potassium and K/Na ratio increased while sodium decreased with the application of BPC-PS amendment in wheat and maize grain. This study concluded that the biochar amendment in conjunction with PS greatly improved SOC storage, crop nutrient uptake and soil fertility. Thus, waste treatment of crop straw and poultry manure compost as biochar could be combined to alleviate salt stress and improve crop production in the vast area of arid and semi-arid regions of the world.
文摘Gracilaria tenuistipitata varliui Zhang el Xia is cultivated at two different salinities (21, 33) in the laboratory for 4 weeks. The daily growth rate is determined. The total agar yield and fractional agar composition are analyzed. Results show that algae grow faster in low salinity. The total agar yield is higher under high salinity conditions than under low salinity conditions. Among the eight fractions extracted, the yields of cold water extract and 40% ethanol extract are about the highest In low salinities the yields of autoclaved extract and 60% ethanol extract are higher, while the yield of cold water extract is lower relative to high salinities.
文摘Salinity of soils or water poses an increasing threat to food production due to climate change. Plant breeding programs were applied to improve salt tolerance in new wheat genotypes to overcome this problem. The aim of this research work is to estimate the realized improvement in salt tolerance of the selected genotypes through plant breeding programs. The comparison experiments were conducted in salinized soils at two locations for two years as compared with two local cultivars. All the selected genotypes derived from F2 populations after six cycles of exposure to high salinity level were tested for salt tolerance during all growth stage. At harvest stage, seed yield and its components were studied for the comparison. Results showed that there were significant differences between all selected genotypes and local eultivars in their overall sensitivities to soil salinity. All selected genotypes were superior in seed yield and its components at maturity to those of the local cultivars at the two location and years. Clearly, all the selected genotypes exhibited more than twice seed yield/m2 compared with that obtained from local cultivars. The results also indicated that there were differences among selected genotypes in their responses to soil salinity between locations and years, but not significant. Important thing is significant improvement in selected genotypes was achieved in their salt tolerance through six cycles of screening and selection to high salinity level. The conclusion is a strong possibility to improve salt tolerant genotypes of wheat with high salt tolerance through plant breeding programs.
