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Precision-engineered phosphate fertilizers designed to accelerate fruit development, improve crop quality, and maximize field management efficiency.
Built on 20+ years of industry experience — delivering world-class phosphate fertilizer solutions.
Founded in 2019, Sichuan Luobu New Material Technology Co., Ltd. is located in Shifang City, Sichuan Province — one of China's key phosphate production regions. The area is known for its strong phosphate resource base and well-developed industrial infrastructure, providing a solid foundation for fertilizer manufacturing and technical innovation.
The company focuses on the research, production, and supply of high-performance phosphate-based fertilizers for modern agriculture, with a particular emphasis on MKP for fruit enlargement and field crop management solutions trusted by growers across 60+ countries worldwide.
Learn MoreMonopotassium Phosphate (MKP, 0-52-34) delivers a uniquely powerful combination of phosphorus and potassium — the two nutrients most critical to fruit cell expansion, sugar accumulation, and structural integrity across all major field crops.
MKP provides 52% P₂O₅ and 34% K₂O in a single, fully water-soluble compound — with no nitrogen to interfere during the critical fruit-fill stage. Phosphorus drives energy transfer and cell division, while potassium regulates water pressure inside fruit cells (turgor), directly governing fruit size, firmness, and sweetness. Applied at the right growth stage, MKP for fruit enlargement in field crop management delivers measurable gains in marketable yield and premium-grade fruit ratios.
During fruit set and early enlargement, phosphorus is the primary driver of ATP energy production and rapid cell division. MKP's ultra-high P₂O₅ content (52%) ensures that crops receive an immediately available phosphorus boost exactly when cellular multiplication is at its peak. This translates directly into more cells per fruit — the biological foundation of larger fruit size at harvest.
Potassium governs osmotic regulation and phloem loading — the biological process that moves photosynthate sugars from leaves into developing fruit. With 34% K₂O, MKP ensures robust potassium supply during the fruit-fill window, resulting in larger, firmer, and sweeter fruit with extended shelf life. In field crop management, this is particularly impactful for tomatoes, peppers, melons, citrus, grapes, and stone fruits.
Unlike NPK blends, pure MKP contains no nitrogen — a critical advantage during the fruit enlargement and ripening phase. Excess nitrogen at this stage promotes vegetative growth at the expense of fruit development, reduces sugar content, and delays maturity. MKP delivers targeted P and K nutrition without stimulating unwanted shoot growth, making it the professional's choice for late-season fruit crop management.
The global market for water-soluble specialty fertilizers — led by MKP — is expanding rapidly, driven by intensifying food demand, precision agriculture adoption, and the commercial premium placed on fruit quality and size grading.
The global water-soluble fertilizer market exceeded USD 17 billion in 2023 and is projected to grow at over 6% CAGR through 2030. MKP accounts for a significant and growing share, driven by expanding high-value horticulture and fruit crop acreage worldwide.
Agricultural drone fleets are transforming field crop management across Asia, Latin America, and the Middle East. Drone-grade MKP — engineered for ultra-fast dissolution and zero nozzle clogging — is becoming a standard input for aerial fertigation programs targeting fruit enlargement at scale.
Global supermarket chains and fresh produce exporters increasingly specify minimum fruit size grades. MKP-based fruit enlargement programs are now a commercial necessity for growers targeting premium export channels in Europe, North America, and the Gulf region.
Modern drip irrigation and fertigation systems are now standard infrastructure on large commercial farms. MKP's complete water solubility and compatibility with fertigation equipment make it the preferred phosphate-potassium source for automated nutrient delivery programs in field crop management.
As climate variability increases heat stress and drought events during fruit-fill periods, potassium-rich fertilizers like MKP are gaining importance for their role in improving plant water-use efficiency and stress tolerance — protecting yield and fruit quality in challenging field conditions.
China dominates global MKP production, supplying over 70% of world demand. Manufacturers in Sichuan Province — home to China's richest phosphate deposits — lead on both quality and cost competitiveness, making them the preferred source for international distributors and importers managing field crop programs at scale.
From foliar sprays to drip fertigation and drone-based programs, MKP for fruit enlargement integrates across every major field crop management system used in commercial horticulture today.
Applying a 0.3–0.5% MKP solution as a foliar spray immediately after fruit set delivers rapid P and K directly to developing fruitlets. This technique is widely used in apple, pear, citrus, and grape orchards to synchronize fruit cell division and ensure uniform enlargement across the canopy.
In tomato, pepper, cucumber, and melon production, MKP is injected through drip lines at rates of 3–8 kg/ha per application during the fruit-fill phase. Fertigation allows precise timing and placement of nutrients, maximizing uptake efficiency and minimizing environmental loss compared to broadcast applications.
Drone-Grade 99% MKP is specifically formulated for agricultural UAV spraying systems. At concentrations of 1–3% in spray solution, it provides a rapid, uniform nutrient boost across large field areas — critical for fruit enlargement programs on crops like corn, soybean, and field-grown vegetables where ground access is limited during the growing season.
In soilless growing systems (hydroponics, NFT, substrate culture), MKP is a standard component of fruit-stage nutrient solutions. Its complete solubility, neutral pH contribution, and chloride-free formula make it compatible with sensitive crops like strawberries, cherry tomatoes, and premium capsicums grown for export markets.
In banana cultivation across Southeast Asia, Africa, and Latin America, MKP fertigation programs during bunch development are standard practice for achieving minimum export-grade finger weight specifications. Combined with potassium sulfate, MKP provides the high-K nutrition essential for bunch fill and peel quality.
Progressive agronomists integrate MKP into multi-stage nutrient programs that shift from nitrogen-dominant vegetative phases to P-K dominant reproductive phases. MKP serves as the transition fertilizer at flowering, ensuring the crop's nutrient profile aligns with the biological demands of fruit set, enlargement, and ripening across all major field crops.
Luobu's Drone-Grade and Crystal MKP products are engineered to the highest standards of purity, solubility, and field performance — setting the benchmark for MKP for fruit enlargement in field crop management.
Drone-Grade MKP is the flagship product developed and manufactured by Sichuan Luobu New Material Technology Co., Ltd. It is specifically engineered and optimized for agricultural drone application, meeting the practical requirements of modern aerial spraying systems. Formulated to ensure fast dissolution, stable purity, and compatibility with drone spraying equipment, it dissolves completely within seconds, leaves zero residue, and maintains consistent spray uniformity across all major UAV platforms. Conventional products designed for ground application or irrigation systems may not fully meet the technical demands of drone-based farming — Luobu's Drone-Grade MKP was built from the ground up to solve this challenge.
In addition to Drone-Grade MKP, Luobu manufactures conventional crystalline MKP, monoammonium phosphate (MAP), and a range of water-soluble fertilizers designed for fertigation and precision nutrient management. These products are supplied to distributors, importers, and agricultural service providers in both domestic and international markets, covering every application scenario in modern field crop management.
The company operates its own manufacturing facility, equipped with standardized production lines and internal quality control procedures. From raw material sourcing to finished product packaging, each stage follows established operating standards to ensure product consistency and traceability. Particular attention is given to dissolution rate, insoluble residue control, particle distribution, and moisture stability — factors critical in both drone spraying systems and irrigation-based applications.
Luobu holds multiple invention and utility model patents related to fertilizer formulation and application technology. The company has been recognized in China as a National High-Tech Enterprise and has received several provincial-level innovation awards. In 2023, its Drone-Grade MKP was included in the "Top 100 Major Agricultural Science and Technology Achievements" by the Chinese Academy of Agricultural Sciences — a landmark validation of its role in advancing fruit enlargement and field crop management technology.
Although established in 2019, Luobu benefits from a leadership team with over 20 years of experience in the international fertilizer industry. This background enables the company to combine practical manufacturing capability with a deep understanding of global market requirements and customer expectations. The company has developed stable cooperation with partners across Asia, the Middle East, and other emerging agricultural markets — bringing proven MKP fruit enlargement solutions to growers worldwide.
Explore our full portfolio of Monopotassium Phosphate and water-soluble fertilizer products — precision-formulated for fruit enlargement, yield enhancement, and advanced field crop management programs.