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Influence of p-enriched compost application on economics and p use efficiency of a maize–wheat rotation system

The Crop Journal 2018年第6期6卷 651-658页

作者： Abdul Majeed Shahzada Munawar Mehdi Abid Niaz Abid Mahmood Ehsan-Ul-Haq Naeem Ahmad Shahid Javid Atif Mehmood Sugarcane Research Institute Faisalabad Ayub Agricultural Research InstitutePunjabPakistan Soil Fertility Research Institute LahoreAyub Agricultural Research InstitutePunjabPakistan Institute of Soil Chemistry and Environmental Sciences Ayub Agricultural Research InstitutePunjabPakistan Ayub Agricultural Research Institute PunjabPakistan provincial Reference Fertilizer Testing Laboratory Raiwind LahorePunjabPakistan Key Laboratory of Clean Utilization Technology for Renewable Energy Ministry of AgricultureCollege of EngineeringChina Agricultural UniversityBeijing 100083China

Crop phosphorus(p) deficiency and poor utilization of added p is a major agricultural problem due to reduced solubility of soil p and rapid fixation or precipitation of applied p fertilizer in alkaline and calcareous soils. The effects of p-enriched compost and single superphosphate(SSp) fertilization on maize and wheat yields and p use efficiency in a maize–wheat rotation system were studied for three years. On a three-year average, grain yields of maize and wheat after application of p-enriched compost were increased by 18% and 24%, respectively, in comparison with sole addition of a recommended dose of SSp fertilizer. p-enriched compost addition to soil increased maize and wheat yields by 12% and 17%, respectively, compared to p fertilizer plus FYM incorporation. Soil available p concentration and p uptake were affected significantly by the addition of p-enriched compost. On average, increases in p recovery, use efficiency, and agronomic efficiency of 52%, 18%, and 43% were recorded in maize and increases of 50%, 23%, and 49% in wheat. p-enriched compost application yielded 30% and 32%higher economic returns in maize and wheat than SSp fertilization alone.

关键词： p-enriched compost Maize Wheat Farmyard manure p-uptake

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Genotypic Variation for Tolerance to Low Soil phosphorous in Common Bean under Controlled Screen House Conditions

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Agricultural Sciences 2014年第4期5卷 270-285页

作者： Annet Namayanja Johnson Semoka Robin Buruchara Susan Nchimbi Moses Waswa Department of Crop Science and production Sokoine University of Agriculture Morogoro Tanzania Department of Soil Science Sokoine University of Agriculture Morogoro Tanzania International Center for Tropical Agriculture (CIAT) Coordinator for Africa Nairobi Kenya National Crops Resources Research Institute (NaCR-RI)-Namulonge Kampala Uganda

production of common bean (phaseolus vulgaris) is often limited by the low availability of soil phosphorus (p). Identification of common bean genotypes adapted to low phosphorus (p) availability may be a feasible strategy to overcome the poor plant growth and production in p-deficient soils. Genetic variation for p response of thirteen common bean genotypes was studied under screen house controlled conditions using triple super phosphate as p source. The common bean genotypes varied in leaf area, shoot mass, root mass, total root length, basal and lateral roots production, shoot p concentration and p uptake under phosphorous deficiency and high phosphorous. All the measured variables were significantly correlated with each other, which in turn were correlated to p uptake. Generally the large-seeded genotypes RWR 1946 and RWR 2075 appeared to have the best growth, hence superior p efficiency under low p availability, while at the same time they were more responsive to added p. These results complement the earlier field based observed tolerance to low soil phosphorous of the selected genotypes under the BILFA strategy.

关键词： BILFA phaseolus vulgaris phosphorus p-uptake Shoot Mass

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