Land use alternatives are sought to boost agricultural income and productivity in Hainan Island, China.Regional differences exist in crop limitations, such as typhoon risk, low temperatures, poor soil fertility, and d...Land use alternatives are sought to boost agricultural income and productivity in Hainan Island, China.Regional differences exist in crop limitations, such as typhoon risk, low temperatures, poor soil fertility, and drought. In this study a crop zonation was made for a range of crops, among which is banana, as a way to: 1)establish areas for potential expansion for banana, and 2) identify limitations and options for crop and land management. A spatial soil and terrain database of Hainan Island (1:250 000) was linked to the automated land evaluation system (ALES). The qualitative models were verified by comparing suitability maps with actual land use. The results may support policy formulation on issues such as alternatives to current land use, assessment of best management practices, and the need for fertilizer programmes.展开更多
A field study was conducted to investigate the effect of Aquasap, a commercially manufactured biostimulant from seaweed Kappapphycus alvarezii on some hills and foothills banana varieties namely Robusta （AAA）, Njali...A field study was conducted to investigate the effect of Aquasap, a commercially manufactured biostimulant from seaweed Kappapphycus alvarezii on some hills and foothills banana varieties namely Robusta （AAA）, Njali poovan （AB）, Red banana （AAA） and Nendran （AAB） by applying at 5% through foliar spray at the 3rd, 5th and 7th month of plantation. Both quantitative and quality data of fruits were analyzed along with vegetative growth of the plants. The seaweed biostimulant was found very effective on increasing the weight and nutritional contents of all four banana varieties tested. The highest yield was found in Robusta with 56.58% over control followed by Njali poovan, Red banana and Nendran with 19.08%, 39.35% and 11.46%, respectively. Yield of fruits per hectare of four varieties treated were 76.96, 19.23, 29.68 and 23.37 metric ton （mt）, respectively. Fruits of treated plants also showed less moisture level as compared to control with 240.61%, 62.30%, 61.68% and 37.18% more carbohydrate, 283.71%, 94.07%, 62.87% and 38.93% higher proteins and 153.02%, 47.37%, 58.73% and 31.48% higher minerals respectively as compare to control plants. Therefore, the simple practice of application of eco-friendly seaweed based biostimulant would benefit small and marginal farmers of banana.展开更多
Banana bunchy top virus (BBTV),family Nanaviridae,genus Babuvirus,is a single stranded DNA virus (ssDNA) that causes banana bunchy top disease (BBTD) in banana plants.It is the most common and most destructive of all ...Banana bunchy top virus (BBTV),family Nanaviridae,genus Babuvirus,is a single stranded DNA virus (ssDNA) that causes banana bunchy top disease (BBTD) in banana plants.It is the most common and most destructive of all viruses in these plants and is widespread throughout the Asia-Pacific region.In this study we isolated,cloned and sequenced a BBTV sample from Hainan Island,China.The results from sequencing and bioinformatics analysis indicate this isolate represents a satellite DNA component with 12 DNA sequences motifs.We also predicted the physical and chemical properties,structure,signal peptide,phosphorylation,secondary structure,tertiary structure and functional domains of its encoding protein,and compare them with the corresponding quantities in the replication initiation protein of BBTV DNA1.展开更多
基金Project supported by United Nation Development Programme (UNDP, No. CPR/96/105/A99).
文摘Land use alternatives are sought to boost agricultural income and productivity in Hainan Island, China.Regional differences exist in crop limitations, such as typhoon risk, low temperatures, poor soil fertility, and drought. In this study a crop zonation was made for a range of crops, among which is banana, as a way to: 1)establish areas for potential expansion for banana, and 2) identify limitations and options for crop and land management. A spatial soil and terrain database of Hainan Island (1:250 000) was linked to the automated land evaluation system (ALES). The qualitative models were verified by comparing suitability maps with actual land use. The results may support policy formulation on issues such as alternatives to current land use, assessment of best management practices, and the need for fertilizer programmes.
文摘A field study was conducted to investigate the effect of Aquasap, a commercially manufactured biostimulant from seaweed Kappapphycus alvarezii on some hills and foothills banana varieties namely Robusta （AAA）, Njali poovan （AB）, Red banana （AAA） and Nendran （AAB） by applying at 5% through foliar spray at the 3rd, 5th and 7th month of plantation. Both quantitative and quality data of fruits were analyzed along with vegetative growth of the plants. The seaweed biostimulant was found very effective on increasing the weight and nutritional contents of all four banana varieties tested. The highest yield was found in Robusta with 56.58% over control followed by Njali poovan, Red banana and Nendran with 19.08%, 39.35% and 11.46%, respectively. Yield of fruits per hectare of four varieties treated were 76.96, 19.23, 29.68 and 23.37 metric ton （mt）, respectively. Fruits of treated plants also showed less moisture level as compared to control with 240.61%, 62.30%, 61.68% and 37.18% more carbohydrate, 283.71%, 94.07%, 62.87% and 38.93% higher proteins and 153.02%, 47.37%, 58.73% and 31.48% higher minerals respectively as compare to control plants. Therefore, the simple practice of application of eco-friendly seaweed based biostimulant would benefit small and marginal farmers of banana.
基金The Central Level,Scientific Research Institutes for Basic R & D Special Fund Business(ITBB110303)
文摘Banana bunchy top virus (BBTV),family Nanaviridae,genus Babuvirus,is a single stranded DNA virus (ssDNA) that causes banana bunchy top disease (BBTD) in banana plants.It is the most common and most destructive of all viruses in these plants and is widespread throughout the Asia-Pacific region.In this study we isolated,cloned and sequenced a BBTV sample from Hainan Island,China.The results from sequencing and bioinformatics analysis indicate this isolate represents a satellite DNA component with 12 DNA sequences motifs.We also predicted the physical and chemical properties,structure,signal peptide,phosphorylation,secondary structure,tertiary structure and functional domains of its encoding protein,and compare them with the corresponding quantities in the replication initiation protein of BBTV DNA1.
