Effect Of Inundation By Giving GA3 And Salicylic Acid On Growth And Production Of 3 Soybean Varieties (Glycine Max (L.) Merril)

by ADMIN 128 views

Introduction

Inundation is a common phenomenon in many agricultural areas, particularly in regions with high rainfall or flooding. This condition can significantly impact crop growth and productivity, especially for soybean varieties. To mitigate the effects of inundation, farmers and agronomists often use growth regulators, such as GA3 (gibberellic acid) and salicylic acid, to enhance plant growth and resilience. However, the effectiveness of these treatments can vary depending on the soybean variety, inundation conditions, and growth regulator concentrations.

This study aimed to investigate the impact of inundation and application of GA3 and salicylic acid on the growth and production of three soybean varieties: Agromulyo, Demas-1, and Willis. The research was conducted at the Faculty of Agriculture, University of North Sumatra, using a random design group with three treatment factors: plant varieties, inundation conditions (control and inundated), and growth regulator treatments (control, 100 ppm GA3 + 100 ppm salicylic acid, and 200 ppm GA3 + 200 ppm salicylic acid).

Methodology

The study employed a randomized complete block design (RCBD) with three treatment factors: plant varieties, inundation conditions, and growth regulator treatments. The experiment consisted of 36 treatment combinations, with three replications for each combination. The soybean seeds were sown in a nursery bed, and the seedlings were transplanted to the experimental field after 4 days.

The growth regulators, GA3 and salicylic acid, were applied at concentrations of 100 ppm and 200 ppm, respectively. The inundation conditions were simulated by flooding the experimental field with water for 24 hours. The growth parameters measured included plant height, number of leaves, number of pods, percentage of empty pods, and weight of 100 seeds.

Results

The results showed that soybean varieties had a significant effect on several growth parameters, including plant height, number of leaves, number of pods, percentage of empty pods, and weight of 100 seeds. The varieties tested showed a real difference in plant height at the ages of 4, 5, and 6 days after planting (MST), the number of leaves at the same age, and the number of pods containing, the percentage of empty pods, and weighing 100 seeds.

Growth regulatory substances had a significant effect on plant height at the age of 4 MST. Meanwhile, the conditions of inundation also significantly affected the number of pods and the percentage of empty pods. The interaction between inundation and growth regulators had a significant effect on the number of leaves at the age of 4 MST. In addition, the interaction between varieties and growth regulators had a significant effect on chlorophyll levels B.

Analysis

From the results of the study, it can be concluded that the various treatments given have a variety of influence on the growth and yield of soybean plants. The difference in response between varieties shows that the selection of appropriate varieties is very important in certain environmental conditions, such as inundated. Demas-1 varieties stand out in terms of chlorophyll accumulation, which is directly related to the ability of photosynthesis, while Willis varieties show the best potential in terms of protein and enzyme activity, which shows the capacity of response to stress.

The use of GA3 and salicylic acid as growth regulators also shows effectiveness in increasing plant growth under certain conditions. This shows that modern agricultural technology can be used to increase agricultural production, especially in facing the challenges of climate change.

Conclusion

This study provides valuable insight into how inundation and treatment with growth regulators can affect the growth and results of soybean varieties. Taking into account the results and analysis, farmers and agronomy experts can better plan soybean cultivation strategies to increase crop productivity and resilience to unfavorable environmental conditions.

Recommendations

Based on the findings of this study, the following recommendations are made:

  1. Selection of soybean varieties: Farmers and agronomists should select soybean varieties that are tolerant to inundation and have high chlorophyll accumulation, such as Demas-1.
  2. Use of growth regulators: The use of GA3 and salicylic acid as growth regulators can be effective in increasing plant growth under certain conditions.
  3. Crop management: Farmers and agronomists should implement crop management practices that promote plant growth and resilience, such as irrigation management and fertilization.
  4. Climate change mitigation: The use of modern agricultural technology, such as growth regulators, can help mitigate the effects of climate change on crop productivity.

Future Research Directions

This study provides a foundation for further research on the effects of inundation and growth regulators on soybean varieties. Future research directions include:

  1. Investigating the effects of different growth regulator concentrations: Further research is needed to investigate the effects of different concentrations of GA3 and salicylic acid on soybean growth and productivity.
  2. Examining the effects of other environmental factors: The effects of other environmental factors, such as temperature and soil moisture, on soybean growth and productivity should be investigated.
  3. Developing new soybean varieties: New soybean varieties that are tolerant to inundation and have high chlorophyll accumulation should be developed.

Limitations of the Study

This study has several limitations, including:

  1. Small sample size: The sample size of this study was relatively small, which may limit the generalizability of the results.
  2. Limited environmental conditions: The study was conducted under limited environmental conditions, which may not reflect the full range of environmental conditions that soybean plants may encounter.
  3. Limited growth regulator concentrations: The study only investigated the effects of two growth regulator concentrations, which may not reflect the full range of concentrations that may be effective.

Future Directions

This study provides a foundation for further research on the effects of inundation and growth regulators on soybean varieties. Future research directions include:

  1. Investigating the effects of different growth regulator concentrations: Further research is needed to investigate the effects of different concentrations of GA3 and salicylic acid on soybean growth and productivity.
  2. Examining the effects of other environmental factors: The effects of other environmental factors, such as temperature and soil moisture, on soybean growth and productivity should be investigated.
  3. Developing new soybean varieties: New soybean varieties that are tolerant to inundation and have high chlorophyll accumulation should be developed.

Conclusion

In conclusion, this study provides valuable insight into how inundation and treatment with growth regulators can affect the growth and results of soybean varieties. The findings of this study have implications for farmers and agronomists who are seeking to increase crop productivity and resilience to unfavorable environmental conditions. Future research directions include investigating the effects of different growth regulator concentrations, examining the effects of other environmental factors, and developing new soybean varieties.

Q1: What is the purpose of this study?

A1: The purpose of this study is to investigate the impact of inundation and application of GA3 and salicylic acid on the growth and production of three soybean varieties: Agromulyo, Demas-1, and Willis.

Q2: What are the treatment factors used in this study?

A2: The treatment factors used in this study are plant varieties, inundation conditions (control and inundated), and growth regulator treatments (control, 100 ppm GA3 + 100 ppm salicylic acid, and 200 ppm GA3 + 200 ppm salicylic acid).

Q3: What are the growth parameters measured in this study?

A3: The growth parameters measured in this study include plant height, number of leaves, number of pods, percentage of empty pods, and weight of 100 seeds.

Q4: What are the results of this study?

A4: The results of this study show that soybean varieties have a significant effect on several growth parameters, including plant height, number of leaves, number of pods, percentage of empty pods, and weight of 100 seeds. Growth regulatory substances have a significant effect on plant height at the age of 4 MST. Meanwhile, the conditions of inundation also significantly affect the number of pods and the percentage of empty pods.

Q5: What are the implications of this study?

A5: The implications of this study are that the selection of appropriate soybean varieties is very important in certain environmental conditions, such as inundated. Demas-1 varieties stand out in terms of chlorophyll accumulation, which is directly related to the ability of photosynthesis, while Willis varieties show the best potential in terms of protein and enzyme activity, which shows the capacity of response to stress.

Q6: What are the recommendations of this study?

A6: The recommendations of this study are:

  1. Selection of soybean varieties: Farmers and agronomists should select soybean varieties that are tolerant to inundation and have high chlorophyll accumulation, such as Demas-1.
  2. Use of growth regulators: The use of GA3 and salicylic acid as growth regulators can be effective in increasing plant growth under certain conditions.
  3. Crop management: Farmers and agronomists should implement crop management practices that promote plant growth and resilience, such as irrigation management and fertilization.
  4. Climate change mitigation: The use of modern agricultural technology, such as growth regulators, can help mitigate the effects of climate change on crop productivity.

Q7: What are the limitations of this study?

A7: The limitations of this study are:

  1. Small sample size: The sample size of this study was relatively small, which may limit the generalizability of the results.
  2. Limited environmental conditions: The study was conducted under limited environmental conditions, which may not reflect the full range of environmental conditions that soybean plants may encounter.
  3. Limited growth regulator concentrations: The study only investigated the effects of two growth regulator concentrations, which may not reflect the full range of concentrations that may be effective.

Q8: What are the future directions of this study?

A8: The future directions of this study are:

  1. Investigating the effects of different growth regulator concentrations: Further research is needed to investigate the effects of different concentrations of GA3 and salicylic acid on soybean growth and productivity.
  2. Examining the effects of other environmental factors: The effects of other environmental factors, such as temperature and soil moisture, on soybean growth and productivity should be investigated.
  3. Developing new soybean varieties: New soybean varieties that are tolerant to inundation and have high chlorophyll accumulation should be developed.

Q9: What are the potential applications of this study?

A9: The potential applications of this study are:

  1. Improving crop productivity: The findings of this study can be used to improve crop productivity by selecting soybean varieties that are tolerant to inundation and have high chlorophyll accumulation.
  2. Mitigating the effects of climate change: The use of modern agricultural technology, such as growth regulators, can help mitigate the effects of climate change on crop productivity.
  3. Developing new agricultural technologies: The findings of this study can be used to develop new agricultural technologies that can improve crop productivity and resilience to unfavorable environmental conditions.

Q10: What are the potential benefits of this study?

A10: The potential benefits of this study are:

  1. Improved crop productivity: The findings of this study can be used to improve crop productivity by selecting soybean varieties that are tolerant to inundation and have high chlorophyll accumulation.
  2. Increased food security: The use of modern agricultural technology, such as growth regulators, can help increase food security by improving crop productivity and resilience to unfavorable environmental conditions.
  3. Economic benefits: The findings of this study can be used to develop new agricultural technologies that can improve crop productivity and resilience to unfavorable environmental conditions, resulting in economic benefits for farmers and the agricultural industry.