Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Flower, Berry and True Potato Seed Production in Potato Mother Plants (solanum Tuberosum L.). 2. Effects of Nitrogen and Potassium Fertilizers

Tuhin Suvra Roy
Faculty of Agriculture, Shere-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka - 1207, Bangladesh

Takashi Nishizawa
Faculty of Agriculture, Yamagata University, Tsuruka, 997-8555, Japan

Mohammed Hazrat Ali
Faculty of Agriculture, Shere-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka - 1207, Bangladesh

Abstract/ Executive Summary:

The combined effects of different levels of nitrogen and potassium fertilizers on flowering and yield components of True Potato Seed (TPS) were investigated using crosses of ?MF-II and ?TPS-67. Twelve combinations of 3 N (0, 225 and 300 kg ha^-1, respectively) and 4 K (0, 125, 175 and 225 kg ha^-1, respectively) levels were applied to MF-II. Different levels of N or K showed significant effects on flowering and TPS yield. The combinations of N and K were also significant for most of the parameters except for the number of flowers inflorescence^-1, number of berries plant^-1 and number of TPS per small and medium size berry. Out of 12 treatment combinations, 225 kg N and 225 kg K ha^-1produced the highest number of berries (22.7) and yield of berries plant^-1 (207.2 g), whereas 225 kg N and 125 kg K ha^-1 produced the maximum number of TPS berry^-1 (196). The weight of 100-TPS increased with increasing N rate but decreased with increasing K rate; the results revealed that an inverse relation was observed between N and K on 100-TPS weight. The highest 100-TPS weight (83.8 mg) and maximum quantity (113.0 kg ha^-1) of quality (> 1.18 mm) TPS were obtained with the application of 300 kg N and 125 kg K ha^-1, while 225 kg N and 125 kgK ha^-1 produced the highest TPS yield (145.3 kg ha^-1). Our study showed that 300 kg N and 125 kgK ha^-1 was the best combination for commercial production of quality TPS obtained from MF-II x TPS-67.

Keywords: Berryy, Nitrogen, Potassium, TPS weight, Yield

Location: Experimental field, Tuber Crops Research Center, Bangladesh Agricultural Research Institute, Joydevpur

Start Date: 00-00-2005

End Date: 00-00-2006

Program Area: Crop-Soil-Water Management

Commodity: Potato

Objectives:

To study the effects of combinations of N and K at the optimum dosage for P application (120 kg ha^-1) and to find the best combinations of N, P and K application for the production of hybrid TPS from MF-II x TPS-67.

Methodology:

The experiment was conducted at the experimental field of the Tuber Crops Research Center, Bangladesh Agricultural Research Institute, Joydevpur, Bangladesh, during 2005-2006. The soil had a pH of 6.82 and contained 1.63% organic matter, 0.095% N (Jones, 1991), 0.0011% available P, 0.133 me% exchangeable K and 0.00126% available S content. Considering the findings of our previous study, 2 levels of N (225 and 300 kg ha^-1) and a fixed value of P (120 kg ha^-1) were selected for testing as promising for TPS production. In this experiment, therefore, factor 1 comprising 3 levels of N: 0, 225 and 300 kg ha^-1 (N₀, N₂₂₅ and N₃₀₀ kg ha^-1, respectively) and factor 2 comprising 4 levels of K: 0, 125, 175 and 225 kg ha^-1 (K₀, K₁₂₅, K₁₇₅ and K₂₂₅ kg ha^-1, respectively) were applied in a split-plot design with 3 replications. Nitrogen was assigned to main-plots and K to sub-plots. Urea, muriate of potash and triple super phosphate were the N, K and P sources. The mother plants were planted on 21 October 2005 and received the recommended rates of fertilizers for tuber production of 120-12-6 kg ha^-1 Gypsum-ZnSO₄-Borax and 10 t ha^-1 farmyard manure, at 3 days before planting (Anonymous, 2004). Based on our previous findings, 120 kg P ha^-1 was applied in all treatments. Male plants (TPS-67) were planted in separate plots on 14 October 2005 to harmonize their flowering with that of the female plants. All other practices and procedures of production, extraction and drying of TPS were similar to those described in our previous report. After proper drying, TPS were separated into fractions of large-(> 1.4 mm), medium-(1.4-1.18 mm) and small-(<1.18 mm) sized seed, using testing sieves (Tokyo Screen, Japan). The analysis of variance was carried out using MSTAT-C statistical software. Means were compared using the least significant differences (LSDs) test at a 5% probability level.

Source of Information: Journal of Agronomy, 6: 88-93, 2007; SSN 1680-8207

Article Link (Online Journal): DOI: 10.3923/ja.2007.88.93; URL: http://scialert.net/abstract/?doi=ja.2007.88.93

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Considering the present results together with the previous studies, it can be concluded that the combination of 300 kg N, 120 kg P and 125 kg K ha^-1was the most suitable for the commercial production of hybrid TPS from ?MF-II x ?TPS-67.

Knowledge Management: Journal