Effect of Different Levels of Potassium and Green Manure on Available K, Uptake of K and Potassium Use Efficiency of Rice (Oryza Sativa. L)

2017 ◽  
Vol 104 (1-3) ◽  
Author(s):  
Sujatha D.V ◽  
◽  
Kavitha P ◽  
Naidu M.V.S ◽  
Uma Maheswari P ◽  
...  
Keyword(s):  
Green Manure ◽  
Dry Matter ◽  
Oryza Sativa L ◽  
Fertilizer Application ◽  
Dry Matter Production ◽  
Matter Production ◽  
K Fertilizer ◽  
Potassium Use Efficiency ◽  
Use Efficiency ◽  
Different Levels

A field experiment was carried out at Agricultural College Farm, Mahanandi in Kurnool district of Andhra Pradesh to study the effect of different levels of potassium and green manure on yield, dry matter production, content, uptake of potassium, available K and potassium use efficiency of rice during kharif 2015. The results revealed that the yield, dry matter production, content, uptake of potassium, available K and potassium use efficiency were significantly increased with increase in K fertilizer application and also due to green manure incorporation. The highest yield, dry matter production, content and uptake of potassium, available K were obtained with incorporation of green manure (Dhaincha @ 5 t ha-1) +120 kg K2 O ha-1 which was on par with (Dhaincha @ 5 t ha-1) +80 kg K2 O ha-1and (Dhaincha @ 5 t ha-1)+40 kg K2 O ha-1. Among all the treatments the highest KUE was observed with T6 ((Dhaincha @ 5 t ha-1) +40 kg K2 O ha-1) followed by T7 ((Dhaincha @ 5 t ha-1) + 80 kg K2 O ha-1) and T8 ((Dhaincha @ 5 t ha-1) +120 kg K2 O ha-1). Among the levels of K fertilizer, the highest potassium use efficiency was recorded at 100% RDK (80 kg K2 O ha-1) followed by 150% RDK (120 kg K2 O ha-1)

Discrimination in Carbon Isotopes of Leaves Correlates With Water-Use Efficiency of Field-Grown Peanut Cultivars

1988 ◽  
Vol 15 (6) ◽  
pp. 815 ◽  
Author(s):  
GC Wright ◽  
KT Hubick ◽  
GD Farquhar
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Dry Matter ◽  
Dry Matter Production ◽  
Dry Matter Yield ◽  
Strong Negative Correlation ◽  
Matter Production ◽  
Whole Plant ◽  
Use Efficiency ◽  
The Relationship

Variation in water-use efficiency (W, g of total dry matter produced/kg water used), and its correlation with cultivar isotope discrimination in leaves (Δ) was assessed in peanut plants grown in small canopies in the field. Plants were grown in separate minilysimeters that were both embedded in the ground and positioned above the crop. Differences among cultivars were found in W and � and the relationship between W and Δ was compared for plants grown in open and closed canopies. Genetic variability in W in plants grown in the field under non-limiting water conditions was demonstrated, with Tifton-8, of Virginia habit, having the highest W (3.71 g/kg) and Rangkasbitung, an Indonesian cultivar of Spanish habit, the lowest (2.46 g/ kg). Variability in W was due to variation in total dry matter production more than that of water use. A strong negative correlation was found between Δ and W, and also between Δ and total dry matter. The relationship between whole plant W, including roots, and Δ was stronger than that between shoot W, without roots and Δ. The improvement occurred because of variation among cultivars in the root to shoot ratio. This highlights the importance of taking account of root dry matter in studies concerning W. There were significant differences in W and Δ between plants in pots above-ground compared to pots in the ground, with above-ground plants having significantly lower values of both W and Δ. The ranking of W and Δ among cultivars was not affected by the contrast in environment, which suggests these parameters are under strong genetic control. Total above-ground dry matter yield at maturity was negatively correlated with Δ, while pod yield was not. It appears a negative association between harvest index and Δ may exist; however not all cultivars used in this and other studies follow this response. Both water-use efficiency, Wand total dry matter production are negatively correlated with Δ in leaves of peanut plants grown in small canopies in the field. Measurement of Δ may prove a useful trait for selecting cultivars with improved W and total dry matter yield under field conditions.

scholarly journals Effect of K-N-Humates on Dry Matter Production and Nutrient Use Efficiency of Maize in Sarawak, Malaysia

2010 ◽  
Vol 10 ◽  
pp. 1282-1292 ◽  
Author(s):  
Auldry Chaddy Petrus ◽  
Osumanu Haruna Ahmed ◽  
Ab Majid Nik Muhamad ◽  
Hassan Mohammad Nasir ◽  
Make Jiwan
Keyword(s):  
Humic Substances ◽  
Dry Matter ◽  
Nutrient Use Efficiency ◽  
Inorganic Fertilizer ◽  
Organic Fertilizers ◽  
Dry Matter Production ◽  
Nutrient Use ◽  
Matter Production ◽  
Standard Procedures ◽  
Use Efficiency

Agricultural waste, such as sago waste (SW), is one of the sources of pollution to streams and rivers in Sarawak, particularly those situated near sago processing plants. In addition, unbalanced and excessive use of chemical fertilizers can cause soil and water pollution. Humic substances can be used as organic fertilizers, which reduce pollution. The objectives of this study were to produce K- and ammonium-based organic fertilizer from composted SW and to determine the efficiency of the organic-based fertilizer produced. Humic substances were isolated using standard procedures. Liquid fertilizers were formulated except for T2 (NPK fertilizer), which was in solid form. There were six treatments with three replications. Organic fertilizers were applied to soil in pots on the 10th day after sowing (DAS), but on the 28th DAS, only plants of T2 were fertilized. The plant samples were harvested on the 57th DAS during the tassel stage. The dry matter of plant parts (leaves, stems, and roots) were determined and analyzed for N, P, and K using standard procedures. Soil of every treatment was also analyzed for exchangeable K, Ca, Mg, and Na, organic matter, organic carbon, available P, pH, total N, P, nitrate and ammonium contents using standard procedures. Treatments with humin (T5 and T6) showed remarkable results on dry matter production; N, P, and K contents; their uptake; as well as their use efficiency by maize. The inclusion of humin might have loosened the soil and increased the soil porosity, hence the better growth of the plants. Humin plus inorganic fertilizer provided additional nutrients for the plants. The addition of inorganic fertilizer into compost is a combination of quick and slow release sources, which supplies N throughout the crop growth period. Common fertilization by surface application of T2 without any additives (acidic and high CEC materials) causes N and K to be easily lost. High Ca in the soil may have reacted with phosphate from fertilizer to form Ca phosphate, an insoluble compound of phosphate that is generally not available to plants, especially roots. Mixing soil with humin produced from composted SW before application of fertilizers (T5 and T6) significantly increased maize dry matter production and nutrient use efficiency. Additionally, this practice does not only improve N, P, and K use efficiency, but it also helps to reduce the use of N-, P-, and K-based fertilizers by 50%.

Effects of Nitrogen, Phosphorus, Potassium and Magnesium on Growth of the Oil Palm

1972 ◽  
Vol 8 (4) ◽  
pp. 347-353 ◽  
Author(s):  
R. H. V. Corley ◽  
C. K. Mok
Keyword(s):  
Leaf Area ◽  
Oil Palm ◽  
Dry Matter ◽  
Fertilizer Application ◽  
Dry Matter Production ◽  
Matter Production ◽  
Oil Palms ◽  
Net Assimilation ◽  
Nitrogen Phosphorus ◽  
Bunch Yield

SUMMARYPotassium application appeared to increase dry matter production and yield of oil palms, primarily by increasing leaf area, while nitrogen increased both leaf area and net assimilation rate. Responses to phosphorus and magnesium were harder to interpret. Production of vegetative dry matter attained a fairly constant level at the higher rates of fertilizer application, while the ratio of bunch yield to total dry matter production was little affected by fertilizer treatments. The importance of these results for oil palm breeding, and their possible value in diagnosing fertilizer requirements, are briefly discussed.

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