Seed Yield and Yield Contributing Characters as Influenced by N Supply in Rapeseed‐mustard

Abstract

hriaata pmea, cv. Pusa Bold, and ft campestm, cv. Pusa Kalyani, were raised under field conditions with varying leiels of N supply from 0-120kgha"'. The production profile of branches and pods thereon was measured, per unit area basis, throughour rhe crc^ ontogeny. At maturity, data on the yield contributing characters, viz. pod dry weight, pod number, seed nvimber per pod. ifKX) seed weight, seed wall ratio and seed jiekl in different order branches, was recorded.The branching pattern and the number of pods pr4>duced on different order brariches, in the rwo species, was favourably modified by the increasirig levels of N supply. Primary arid secondary branches contrihuted to the seed yield to an extent of 80 °/i. of the total yield. Nitrogen treatment had no significant effect on 100 (> seed weight. B.juncea exhibited significandy higher yield over B. campestris. N supply up to 120 kg ha' ' linearly increased seed yield in both the species. However, it exerted a ne^tive effect on partitioning of assimilates feim pod wall co seed. The study indicated that rape.seed-mustard, grown under short winter-season environment with adequate soil moisture, has the potential for higher N-feniliier optima exceeding 120 kgha"'. fey words: Growth, N supply, rapeseed-mustard, seed yield, yield contributiiig characters.

Cottonseed yield and its quality as affected by mineral fertilizers and plant growth retardants

“…Yield increases in this study were attributed to the fact that N was an important nutrient in controlling new growth, thus influencing boll development, increasing the number of bolls plant −1 and boll weight. Synthesis of fat requires both N and carbon skeletons during the course of seed development [5]. The application of K at all the three concentrations tended to increase seed oil content and yield over the control (37.7 -64.2 kg oil ha −1 ), but was statistically significant only for 638 and 957 g·K·ha −1 concentrations on the seed oil content, and with K application at all the three concentrations on the oil yield ha −1 [37].…”

“…Ansari and Mahey [4] evaluate the effects of N level (0, 40, 80, 120 and 160 kg·ha −1 with increasing N level up to 80 kg·ha −1 . Nitrogen is an essential nutrient for the synthesis of fat, which requires both N and carbon skeletons during the course of seed development [5]. On the other hand, nitrogen plays the most important role in building the protein structure [6].…”

“…These results suggest that the high N-rate increases the amino acids synthesis in the leaves, and this stimulates the accumulation of protein in the seed rather than oil content. Patil et al [5] ) [35]. Hedin et al [61] found that Cycocel increased protein content by 17% -50% in leaves and squares harvested 4 wk after the first application.…”

Investigating of N and K Fertilizers on Yield and Components of Soybean (Glycine max (L.) Merr.)

“…Synthesis of fat requires both N and carbon skeletons during the course of seed development (Pattl et al, 1996). Nitrogen is also the main factor in protein production in the plant (Frink et al, 1999).…”

Adoption of Bt Cotton: Threats and Challenges

“…Nitrogen plays the most important role in building the protein structure (Frink et al, 1999). Seed development requires both N and C skeletons (Patil et al, 1996). Nitrogen deficiency produced ethylene at an early crop development stage, which resulted in increased square, flower, and boll shedding in cotton (Legé et al, 1997).…”