Characteristics of Dry Matter Accumulation and Effect of Fertilizer Application in Cassava

This study aimed to improve nitrogen utilization and alleviate the inhibition of straw decomposition during early tillering and the growth of paddy after straw return. Specifically, three different nitrogen fertilizer (base fertilizer) application methods were tested under full straw return: applying the compound fertilizer once (J1), applying the compound fertilizer twice (J3) and applying the ammonium carbonate fertilizer plus compound fertilizer (J2). Full straw return without fertilizer (CK1) and no straw return without fertilizer (CK2) were used as the controls. The results showed that treatment with ammonium carbonate fertilizer combined with compound fertilizer (J2) significantly enhanced straw decomposition, light interception and dry matter accumulation at an early stage of tillering, but reduced tiller occurrence at a late tillering stage. Grain yield was affected due to reduced dry matter accumulation, nitrogen use efficiency and number of effective panicles. There were no significant differences in rice growth, nitrogen use efficiency and grain yield between the one-time or two-time compound fertilizer application methods. In contrast, treatment with ammonium carbonate fertilizer combined with compound fertilizer (J2) under full straw return effectively improved straw decomposition and accelerated the return of green and tillering. In addition, the proportion of ammonium carbonate fertilizer affected the nutrient utilization efficiency and yield at later stages.

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Productivity of Spring Wheat Using Megamix Mineral Fertilizers

BIO Web of Conferences ◽

10.1051/bioconf/20213700186 ◽

2021 ◽

Vol 37 ◽

pp. 00186

Author(s):

Vasily Vasin ◽

Alexey Burunov ◽

Natalia Vasina ◽

Anatoly Strizhakov

Keyword(s):

Durum Wheat ◽

Spring Wheat ◽

Dry Matter ◽

Flag Leaf ◽

Fertilizer Application ◽

Mineral Fertilizers ◽

Forest Steppe ◽

Dry Matter Accumulation ◽

Middle Volga Region ◽

Photosynthetic Potential

The paper shows the research results related to the development of methods to increase the yield of spring wheat using Megamix liquid mineral fertilizers in the presowing treatment of seeds, treatment of crops on vegetation when introducing mineral fertilizers in seedbed preparation in the forest-steppe conditions of the Middle Volga region. The studies were carried out on the experimental field of Samara State University in 2017-2020. During the three-factor field experiment, dry matter accumulation and photosynthetic activity were evaluated with the analysis of photosynthetic potential and net productivity of photosynthesis. It was established that the best indicators are formed on versions with the treatment of seeding material with Megamix Seeds or Megamix Profi agents with subsequent double treatment on vegetation with Megamix Profi in the amount of 0.5l/ha (in the tillering phase) + Megamix Nitrogen in the amount of 0.5l/ha (in the flag leaf phase) against the background of N32P32K32 fertilizer application. The application of Megamix agents in the system of seed treatment + treatment of crops with Megamix stimulating agents provides the maximum accumulation of dry matter in the version of Megamix Seeds treatment and the treatment of crops with a mixture of Megamix Profi + Megamix Nitrogen – 591.9 g/m on soft crops and 622.6 g/m2 – durum wheat against the background of N32P32K32 application. The maximum photosynthetic potential of 0.968…1.091 million m2/ha per day is formed in these versions, and, consequently, the maximum yields with values of 3.73 t/ha on soft wheat crops and 3.44 t/ha on durum wheat crops. It was found that the use of liquid mineral fertilizers on all versions of the experiment reliably increases the yield of spring wheat.

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Assessment of the impact of NP fertilizer application depth on the rate of initial dry matter accumulation of maize (Zea mays L.)

Biometrical Letters ◽

10.2478/bile-2020-0016 ◽

2020 ◽

Vol 57 (2) ◽

pp. 253-260

Author(s):

Katarzyna Ambroży-Deręgowska ◽

Piotr Szulc ◽

Iwona Mejza

Keyword(s):

Dry Matter ◽

Developmental Stages ◽

Thermal Conditions ◽

Fertilizer Application ◽

Nitrogen Fertilizers ◽

Dry Matter Accumulation ◽

Starting Dose ◽

Maize Cultivation ◽

The Impact ◽

Np Fertilizer

SummaryA field study was conducted at the Department of Agronomy of Poznań University of Life Sciences to determine the effect of the depth of NP fertilizer application in maize cultivation on the dynamics of initial maize growth, expressed in dry matter of a single plant at two juvenile maize stages. The adopted assumptions were verified on the basis of a four-year field experiment using four depths of NP fertilizer application, two nitrogen fertilizers and two nitrogen dose application dates. Thermal conditions in the early maize growing season had a significant effect on maize response to the depth of application of a phosphorus starting dose. Row fertilization (regardless of the depth of fertilizer application) was more effective than broadcast fertilization at both studied developmental stages.

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Effects of Nitrogen Fertilizer Application Time on Dry Matter Accumulation and Yield of Chinese Potato Variety KX 13

Potato Research ◽

10.1007/s11540-012-9220-y ◽

2012 ◽

Vol 55 (3-4) ◽

pp. 303-313 ◽

Cited By ~ 7

Author(s):

Lei Sun ◽

Liulian Gu ◽

Xianlong Peng ◽

Yuanying Liu ◽

Xuezhan Li ◽

...

Keyword(s):

Potato Variety ◽

Nitrogen Fertilizer ◽

Dry Matter ◽

Fertilizer Application ◽

Dry Matter Accumulation ◽

Application Time

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Production and partitioning of dry matter in leren [Calathea allouia (Aubl.) Lindl].

The Journal of Agriculture of the University of Puerto Rico ◽

10.46429/jaupr.v95i1-2.2545 ◽

1969 ◽

Vol 95 (1-2) ◽

pp. 35-44

Author(s):

Puran Bridgemohan

Keyword(s):

Dry Matter ◽

Leaf Growth ◽

Field Trials ◽

Fertilizer Application ◽

Dry Matter Accumulation ◽

Field Station ◽

Full Sunlight ◽

Matter Production ◽

Crop Density ◽

The University

Leren [Calathea allouia (Aubl.) Lindl] is an under-exploited tropical tuber crop with potential for processing and as a substitute for water chestnuts. Shade affects the photosynthetic rate, and the growth and yields are variable. There Is little research In the Improvement on the agronomy of the crop. This study set out to understand the production and partitioning of assimilates as influencing crop yield through the manipulation of light, density, and nutritional factors, as well as to determine whether the rhizome of leren is the true sink or a filter/storage receptacle for tuberization. Several field and greenhouse studies were conducted over a two-year period at the Field Station of the University of Trinidad and Tobago. The treatments were light [full sunlight and shade (50%)], density (20.8 and 27.7 thousand plants per hectare), and fertilizer [N-P2-O5-K2O (13:13:20)] at varying rates (0.0 to 0.6 t/ha). The leaf area, dry matter, and tuber yield were monitored. The results indicated that LAI varied between 1.38 (full sunlight) and 3.08 (shade) and was not influenced by crop nutrition. For both the greenhouse and field trials, rhizome dry matter accumulation and partitioning into tubers was higher in the shade treatments. Fertilizer application did not influence leaf growth or dry matter production (photosynthesis capacity) in the greenhouse trials, but more assimilates partitioned from rhizomes into the tubers in the lower crop density x intercrop. The partitioning of assimilates from the shoot to rhizome, and from rhizomes into tuber was more efficient in the shade x intercrop treatments. The fertilizer application of 0.5 t/ha at the crop density of 20.8 thousand plants per hectare realized the highest dry matter (1,066 g/plant) and tuber (261.3 g/plant) yield. The study suggests that in leren, the rhizome and tubers are the primary and secondary sinks, respectively, with distinct partitioning of assimilates from shoot to rhizomes and from rhizomes to tubers.

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