BASIC NUTRIENT CONSUMPTION AND REMOVAL WITH RAPESEED SEEDS WHEN APPLYING DIFFERENT FERTILIZER COMBINATIONS

In the context of different fertilizer combination applica-tion (urea-ammonia liquor KAS-32, liquid complex fertilizer ZhKU, and compound NPK fertilizerDiammophoska) N89P26K26S14, N70P26K26S14, N73P39K13S14, N89P39K13S14, N87P37S14and N71P37S14, we revealed increased removal of CaO to 15.6-20 kg ha as opposed to 13.8 kg ha in the con-trol; MgO to 12.3-16 kg ha compared to 10.2 kg ha in the control. Taking into account Ca and Mg removal without return, it requires the introduction of compound fertilizers containing these nutrients into the fertilizer system. Nitro-gen removal was 110.3-165.5 kg ha compared to 102.6 kg ha, and sulfur -10.9-12.8 kg ha compared to 7.8 kg ha in the control. The S/N ratio ranged from 8.9-15.4 compared to 14 in the control. For the most part, it was equal to 10.7-12.9 which was indicative of satisfactory sulfur supply to oil seed rape crops and the need to increase sulfur dose to 21-28 kg ha. The largest removal of all nutrients was found inthe variants with N73P39K13S14and N71P37S14; the highest yield was formed with N73P39K13S14with N:P:K removal ratio of 1:0.39:0.21

The Effect of Humic Acid, Vermicompost and Nano-Phosphorous on Growth and Yield Characteristics of Maize (Zea mays L.)

In order to study the effect of adding humic acid, vermicompost and nano-phosphorous on the growth characteristics and yield of maize. An experiment was carried out in one of the fields located in Afak sub-district - Diwaniyah Governorate - Iraq in the autumn season 2020. The experiment was carried out according to a Complete Randomized Blocks Design with three replications. The treatments included adding humic acid at three levels (0, 10 and 20) kg H−1 and coded (H0, H1 and H2) sequentially, while vermicompost was added at two levels (0 and 4) tons H−1 and coded (V0 and V1) sequentially. While nano-phosphorous was added at three levels (0, 5 and 10) kg H−1 that coded by (nP0, nP1 and nP2) sequentially. The results of the experiment showed outperform the fertilizer combination (VnP1), which consisted of vermicompost (4) H− 1ton and nano-phosphorous (5) kgH−1, as it recorded the highest content of chlorophyll in leaves, the highest plant height, the highest weight of the vegetative and root system, the percentage of protein and the total grain yield (66.53). SPAD and 269.93 cm, 53.53 g and 11.853 g) compared to the control treatment that recorded the lowest values, followed by treatment (V) with a single effect of vermicompost (4) tonH−1, which outperformed in the content of leaves from chlorophyll, plant height, dry weight of the vegetative and root system and the percentage of the protein and total yield which recorded (SPAD 65.77, 263.50 cm, 53.04 g, 11.520 g, 12.25% and 12,393 mcg H−1) compared to the control treatment that recorded the lowest values, as the second level of single nano-phosphorous fertilizer (nP2) was significantly superior compared to the levels addition of nP and comparison treatment.

Response of Cabbage Plant for Different Types of Mineral Fertilizer (Brassica Oleracea Var.Capitata)

An experiment was conducted in the field of the College of Agriculture and Forestry, University of Mosul, Iraq during the season 2019-2020 to study the effect of three types of compound mineral fertilizers (F1, F2 and F3) and four levels combination of fertilizers (F4, F5, F6 and F7) also with control treatment (F0) on some growth and yield parameters of cabbage plants Chairman variety, thus the experiment included eight treatments implemented in Randomized Complete Block Design (R.C.B.D) with three replications. The results were summarized as follows: the F5 fertilizer combination achieved the highest significant values in all growth and yield parameters compared to other treatment.

Effects of a One-Time Application of Controlled-Release Nitrogen Fertilizer on Yield and Nitrogen Accumulation and Utilization of Late Japonica Rice in China

A mixture of controlled-release nitrogen (N) fertilizers (CRNFs) and conventional urea (CU) as a single application of basal fertilizer could simplify fertilization in rice cultivation from the traditional and more labor-intensive fertilization strategy of multiple applications of nitrogen. However, the reported benefits of this combined approach in increasing rice yield have varied substantially for various reasons, including that various types of rice are characterized by different N requirements to obtain high yield. In this study, two late japonica rice cultivars, Jia58 (J58) and Jia67(J67), were used to determine the best combination of one of two short-acting CRNFs (release periods were 40 and 60 days) and one of three long-acting CRNFs (release periods were 80, 100 and 120 days) to apply with the CU as a one-time application of basal fertilizer. Six combinations of CRNFs were established based on their release periods: A1, 40 + 80 days; A2, 40 + 100 days; A3, 40 + 120 days; B1, 60 + 80 days; B2, 60 + 100 days; and B3, 60 + 120 days. CU applied split at basal, tillering and panicle differentiation stages, respectively as control (CK). The effects of the different treatment combinations of CRNFs on late-rice grain yield, N accumulation and N-use efficiency in a two-year field experiment were determined. Results showed that, the A2 treatment achieved the same yield as that of CK, and yield of the B2 treatment exceeded the yield of CK. Yield of J58 applied with B2 was 7.35% higher in 2018 and 7.40% higher in 2019 than that of the corresponding yield of CK; yield of J67 applied with B2 was 6.05% higher in 2018 and 6.87% higher in 2019 than that of CK. Compared with other CRNF treatments, the release of N from A2 and B2 was most synchronized with nitrogen uptake by the two cultivars, which indicates that fertilizer combination completely met the nitrogen demands during each growth stage of rice. Rice of the A2 and B2 treatments had higher N accumulation, higher aboveground biomass accumulation and LAI (leaf area index) at the heading and maturity stages and higher photosynthetic activity than those of other CRNF treatments. In conclusion, for late japonica rice in China, the application of the A2 and B2 treatments as optimal type of CRNF can achieve labor saving and yield increasing simultaneously in rice production.

Effect of Different Bio Fertilizers on Yield Of Spring Rice (Oryza Sativa L.) CV. Hardinath-1 in Rajapur Municipality, Bardiya

A field experiment was carried out at Rajapur, Bardiya Nepal to determine the effect of different biofertilizers on the yield of spring rice (Oryza sativa L.). Five different combinations of biofertilizers and chemical fertilizer viz. T1 (Azolla + N:P:K @50:15:15 kg ha-1), T2 (Azotobacter+ N:P:K @50:15:15 kg ha-1), T3 (Azotobacter +Mycorrhiza + N:P:K @50:15:15 kg ha-1), T4 (Azotobacter + Phosphorus Solubilizing Bacteria+ Potassium Mobilizing Bacteria+ N:P:K @50:15:15 kg ha-1) and T5 (Recommended chemical fertilizer i.e. N:P:K @100:30:30 kg ha-1) was used. The experiment was laid out in a simple RCBD design with four replications and 3mˣ2m individual plot size. The hardinath-1 variety was used for the experiment. Biometrical observations like plant height (99.92 cm), number of tillers (355.62 m-2) were found significantly highest in T1 (Azolla + NPK@50:15:15 kg ha-1). Similarly, yield attributing characters such as the number of effective tillers (340 m-2), number of filled grains per panicle (114.30), highest panicle length (28.42 cm) was found significantly the highest in T1 (Azolla + NPK@50:15:15 kg ha-1). The highest grain yield (8.46 ton ha-1), straw yield (12.6 ton ha-1), and harvest index (0.40) were also observed on T1 (Azolla + NPK@50:15:15 kg ha-1). Benefit cost ratio was also found highest on T1 (Azolla + NPK@50:15:15 kg ha-1) which was 2.05 incurring the cost of cultivation Rs 72035 per hectare returning the total revenue of Rs 148190 per hectare. The study shows that the application of T1 (Azolla + NPK@50:15:15 kg ha-1) was the best fertilizer combination for spring rice production as it was superior over other fertilizer combinations in terms of yield and yield attributing characters with the highest benefit cost ratio. SAARC J. Agric., 19(1): 57-69 (2021)

Effects of Hydrogen Peroxide on Organically Fertilized Hydroponic Lettuce (Lactuca sativa L.)

Hydroponic production typically uses conventional fertilizers, but information is lacking on the use of organic hydroponic fertilizers. Development of microbial communities and biofilm that can reduce dissolved oxygen availability is a difficulty with organic hydroponics. One potential solution is the use of hydrogen peroxide (H2O2) which can reduce microbial populations and decompose to form oxygen. However, information is lacking on the impact of hydrogen peroxide on hydroponic crop performance. The aim of this study was to determine the effects of H2O2 concentrations in deep water culture hydroponics by assessing how it affects plant size and yield in lettuce (Lactuca sativa L.) “Rouxai”. In this experiment, three H2O2 treatments, namely the application of 0, 37.5 or 75 mg/L H2O2 to 4 L aerated hydroponic containers with either conventional or organic fertilizer, were compared. The containers had either fish-based organic fertilizer (4-4-1, N-P2O5-K2O) or inorganic mineral based conventional nutrient solution (21-5-20, N-P2O5-K2O), both applied at 150 mg/L N. Three replicates of each H2O2 treatment–fertilizer combination were prepared resulting in a total of eighteen mini hydroponic containers each with one head of lettuce. There were two growth cycles: fall 2018 and spring 2019. When added to conventional fertilizers, both 37.5 mg/L and 75 mg/L of H2O2 led to stunted growth or death of lettuce plants. However, when 37.5 mg/L of H2O2 was applied to organic fertilizers, the lettuce yield nearly matched that of the conventionally fertilized control, demonstrating that the application of H2O2 has the potential to make organic hydroponic fertilization a more viable method in the future.

PERTUMBUHAN DAN PRODUKSI BEBERAPA VARIETAS TANAMAN JAGUNG (Zea mays l.) DENGAN PEMBERIAN BERBAGAI DOSIS PUPUK ORGANIK CAIR DAN PUPUK KANDANG

This research aims to determine the effect of varieties and fertilization combinations between liquid organic fertilizer and manure and the interaction of both that provide the best growth and production. This research was carried out in the Religion Agro Tourism garden in Padanglampe Village, Ma'rang District, Pangkajene Regency and the Islands of South Sulawesi Province, from January to May 2020. The experimental design used was a split plot design with two factors, namely variety and a combination of liquid organic fertilizer with manure, variety as the main factor consisted of three levels, namely BISI-18 variety, NASA29 variety and Pertiwi-5 variety. The combination of liquid organic fertilizer with manure as a plot consists of four levels, namely Control, a combination of liquid organic fertilizer with chicken manure, a combination of liquid organic fertilizer with cow manure, a combination of liquid organic fertilizer with manure and cow manure . Data were analyzed by variance using the F Test. The difference in the mean value of the treatment would be tested with Tukey's HSD (honestly significant difference) test at the 0.05% level.The results showed that (1) The treatment of three varieties did not significantly affect all observed parameters. But the Pertiwi-5 variety tends to be the best compared to other varieties. (2) The treatment of fertilizer combination between liquid organic fertilizer and manure significantly influences all of the monitoring parameters. The combination of liquid organic fertilizer 5cc / l. Water with Chicken manure 15 tons / ha and Cow manure 15 tons / ha tend to have a pretty good effect, by showing the dry shell weight per hectare of 8.75 tons / ha. (3) The interaction between varieties with a combination of liquid organic fertilizer and manure does not significantly affect all observation parameters. But the interaction between Pertiwi-5 varieties with a combination of liquid organic fertilizer 5cc / l. Water with Chicken manure 15 tons / ha and Cow manure 15 tons / ha tend to be the best compared to other interactions