Effect of Sowing-Date and Planting Density on Dry Matter Accumulation Dy-namic and Establishment of Its Simulated Model in Maize

2011 ◽  
Vol 36 (12) ◽  
pp. 2143-2153 ◽  
Author(s):  
Xiang-Ling LI ◽  
Ming ZHAO ◽  
Cong-Feng LI ◽  
Jun-Zhu GE ◽  
Hai-Peng HOU ◽  
...  
Keyword(s):  
Dry Matter ◽  
Sowing Date ◽  
Planting Density ◽  
Dry Matter Accumulation ◽  
Simulated Model

scholarly journals Interactive Effects of Sowing Date and Planting Density on Dry Matter Accumulation and Partitioning of Chicory

2012 ◽  
Vol 40 (1) ◽  
pp. 183
Author(s):  
Hamid MADANI ◽  
Christos DORDAS ◽  
Ahad MADANI ◽  
Mohammad-Ali MOTASHAREI ◽  
Shima FARRI
Keyword(s):  
Root Biomass ◽  
Dry Matter ◽  
Plant Density ◽  
Total Yield ◽  
Growing Season ◽  
Sowing Date ◽  
Planting Density ◽  
Yield Potential ◽  
Total Biomass ◽  
Dry Matter Accumulation

Chicory is considered one of the alternatives crops that can be used in crop rotation and contains many phytochemicals that can be used in medicine. In addition, lengthening the growing season by early sowing may increase root chicory yield potential, and thus increase its competitiveness with traditional crops. The objectives of the present study were to determine whether early sowing date risks can be decreased by higher sowing density and also to study the effect of sowing date and sowing density on dry matter accumulation and partitioning of chicory. Growing season did not affect any of the characteristics that were studied. Also plant density affected the flowers biomass, root biomass per plant and the respective yield together with the plant height and essence yield and total yield. The sowing date affected the leaf, flower and stem biomass on a plant basis. However, the interaction between plant density and sowing date affected the total biomass per plant, the flower biomass per plant, the root biomass per plant, the flower yield, the root yield and the essence yield. These results indicate that for higher production it is important to determine the right plant density and sowing date which can affect growth, dry matter accumulation and essence yield.

scholarly journals High Density and Uniform Plant Distribution Improve Soybean Yield by Regulating Population Uniformity and Canopy Light Interception

Agronomy ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1880
Author(s):  
Cailong Xu ◽  
Ruidong Li ◽  
Wenwen Song ◽  
Tingting Wu ◽  
Shi Sun ◽  
...  
Keyword(s):  
Seed Yield ◽  
Dry Matter ◽  
Light Interception ◽  
Plant Distribution ◽  
Planting Density ◽  
Dry Matter Accumulation ◽  
Plant Spacing ◽  
Soybean Yield ◽  
The Relationship ◽  
Canopy Light Interception

Optimizing the spatial distribution of plants under normal conditions of water and fertilizer is widely used by farmers to improve soybean yield. However, the relationship between soybean yield and spatial plant distribution in the field has not been well studied. This study examined the effect of planting density and plant distribution pattern on soybean plant growth, yield components, canopy light interception, and dry matter accumulation. We also analyzed the relationship between photosynthetic rate, dry matter accumulation, and yield under different planting densities and plant distribution. A two year field experiment was conducted during the 2018 and 2019 soybean planting seasons. Two planting densities (1.8 × 105 and 2.7 × 105 plants ha−1) and two plant distribution patterns (uniform and non-uniform plant spacing) were tested. Higher planting density significantly increased the canopy light interception and dry matter accumulation during soybean growth, leading to increased soybean productivity. The seed yield of soybean under higher planting density was 22.8% higher than under normal planting density. Soybean planted under uniform spacing significantly reduced the differences plant-to-plant. Uniform plant spacing significantly increased the canopy light interception and dry matter accumulation of the soybean population. In addition, the coefficient of variation of seed weight per plant between individual plants under uniform plant distribution decreased by 71.5% compared with non-uniform plant distribution. Furthermore, uniform plant distribution increased soybean seed yield by 9.5% over non-uniform plant distribution. This study demonstrates that increasing planting density under uniform plant distribution can be useful to obtain higher seed yield without increasing other farm inputs.

scholarly journals Effects of Mechanically Transplanting Methods and Planting Densities on Yield and Quality of Nanjing 2728 under Rice-Crayfish Continuous Production System

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 488
Author(s):  
Zhi Dou ◽  
Yangyang Li ◽  
Halun Guo ◽  
Linrong Chen ◽  
Junliang Jiang ◽  
...  
Keyword(s):  
Production System ◽  
Dry Matter ◽  
Continuous Production ◽  
Net Assimilation Rate ◽  
Planting Density ◽  
Dry Matter Accumulation ◽  
Assimilation Rate ◽  
Area Index ◽  
Yield And Quality ◽  
Net Assimilation

Rice–crayfish continuous production system offers high economic and ecology benefits, which developed rapidly in China. To investigate the effects of different mechanical transplanting methods and planting densities on rice yield and quality, Nanjing 2728 was used to determine rice growth performance under mechanically transplanted carpet seedling (MTCS) with equal row spacing (30 cm) at five spacings and mechanically transplanted pot seedling (MTPS) with wide and narrow rows (23 + 33 cm) at five spacings. The results showed that MTPS presented significantly higher rice yields than MTCS as more spikelets per panicle. Rice yields of both mechanical transplanting methods first increased and then reduced with decreasing planting density, and its highest value was obtained at 77.9 × 104 seedlings ha−1. Compared with MTCS at the same stage, rice tiller dynamics of MTPS first increased and then decreased. Additionally, its dry matter accumulation per stem at jointing, heading, and maturity stages, leaf area index, photosynthetic potential, crop growth rate, and net assimilation rate were all significantly higher relative to MTCS. For each mechanical transplanting method, dry matter accumulation per panicle, leaf area index, photosynthetic potential, crop growth rate, and net assimilation rate from the sowing to jointing stages declined with decreasing planting density, while dry matter accumulation per stem and net assimilation rate from the heading to maturity stages increased. Compared with MTCS, MTPS significantly improved rice milling and appearance quality, decreasing density was also beneficial to rice milling and appearance quality, while grain content of amylose and protein were not sensitive to both transplanting method and planting density. Consequently, MTPS with 13.8 cm plant spacing is a suitable mechanical transplanting method for Nanjing 2728 to obtain better yield and quality under rice–crayfish continuous production system.

scholarly journals Dry matter accumulation and remobilization in winter barley as affected by genotype and sowing date

Genetika ◽  
2015 ◽  
Vol 47 (2) ◽  
pp. 751-763 ◽  
Author(s):  
Milan Mirosavljevic ◽  
Novo Przulj ◽  
Vojislava Momcilovic ◽  
Nikola Hristov ◽  
Ivana Maksimovic
Keyword(s):  
Grain Yield ◽  
Dry Matter ◽  
Genotypic Variation ◽  
Sowing Date ◽  
Matter Content ◽  
Winter Barley ◽  
Dry Matter Content ◽  
Dry Matter Accumulation ◽  
Sowing Dates ◽  
Barley Genotypes

Knowledge about the effect of genotypic variation and sowing date on dry matter accumulation, remobilization and partitioning in winter barley is important for crop management. Therefore, in field studies, six winter barley genotypes of various origin and maturity groups were studied across four sowing dates. In general, grain yield and dry matter content decreased with delayed sowing, after mid-October, and average grain yield in late October and November sowing was lower 14.2% and 16.9%, respectively, compared to the yield in the optimal sowing date. Among the tested genotypes, high grain yield and dry matter content was obtained from late and medium early barley genotypes. Delayed sowing dates, on average, reduced dry matter remobilization and contribution of vegetative dry matter to grain yield. In years characterized by high spring precipitation, late September and early October sowing of medium early and late barley genotypes enable increased accumulation and remobilization of dry matter and obtainment of high grain yield.

scholarly journals Increased Number of Spikelets per Panicle Is the Main Factor in Higher Yield of Transplanted vs. Direct-Seeded Rice

Agronomy ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2479
Author(s):  
Wenxuan Mai ◽  
Buhailiqem Abliz ◽  
Xiangrong Xue
Keyword(s):  
Dry Matter ◽  
Direct Seeding ◽  
Planting Density ◽  
Cost Ratio ◽  
Dry Matter Accumulation ◽  
Labor Costs ◽  
Planting Methods ◽  
Panicle Number ◽  
Spikelets Per Panicle ◽  
Direct Seeded

With increasing water shortages and labor costs, rice planting is gradually undergoing a transformation from traditional transplanting to direct seeding. However, the yield of direct-seeded rice is unstable and the reasons for this instability are disputed. Therefore, we established a field experiment conducted over 3 years to investigate the reasons for the difference in rice yield under different planting methods. The planting methods compared were transplanting (TR), broadcast sowing (BS), and sowing in line (SL). The yield of rice under TR was higher (10,390 kg ha−1) than that of BS (7790.7 kg ha−1) and SL (9105.2 kg ha−1). Given that the harvest index showed little variation among the three planting methods, the yield differences reflected that shoot dry matter production under TR was higher. Two reasons for the latter observation are suggested: (1) the planting density under TR was lower than that under BS and SL, thus competition for nutrient resources would have been reduced; (2) the growth period of TR was longer. The higher shoot dry matter accumulation under TR contributed to enhanced panicle number per m2 and number of spikelets per panicle than under BS. A significant correlation between number of spikelets per panicle and yield was observed. Although yield was highest under TR, the costs under TR were the highest among the three planting methods. In contrast, the benefit-to-cost ratio under SL was higher than that of TR and BS. The higher yield under TR reflected the production of larger spikelets per panicle than those produced under direct-seeding methods. However, the benefits of SL are conducive to enhanced profitability of rice production.

Effect of seed dressing agents on the emergence of maize sown on different dates

2002 ◽  
Vol 50 (2) ◽  
pp. 169-178
Author(s):  
Z. Gyenes-Hegyi ◽  
S. Záborszky
Keyword(s):  
Dry Matter ◽  
Sowing Date ◽  
Cold Test ◽  
Germination Percentage ◽  
Dry Matter Accumulation ◽  
Initial Growth ◽  
Maize Seed ◽  
Seed Dressing ◽  
Germination Ability ◽  
Emergence Date

Maize seed sown in cold soil during the first ten days of April will only produce a satisfactory stand if the hybrid chosen has adequate chilling tolerance and if the seed has high biological value (germination percentage, cold test) and is treated with a high quality dressing agent. The emergence date is influenced to a great extent by the heat sum, so only a small proportion of the considerable difference in the sowing date is manifested in the emergence date. Nevertheless, healthy plants emerging from early-sown seed have more rapid initial growth and development, as demonstrated by their greater shoot dry matter accumulation. It is not worth risking early sowing in heavily infected soil, with seed lots having poor germination ability, without adequate seed dressing, or with chilling-sensitive hybrids.

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