Nutrient Transformations in Soils Amended with Green Manures

Yandvinder-Singh,; Bijay‐Singh,; Khind, C. S.

doi:10.1007/978-1-4612-2930-8_5

Cited by 83 publications

(19 citation statements)

References 108 publications

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“…Residues also increase the P availability in soil by stimulating the microbial production of organic acid anions and phenolic compounds, which might lead to the mobilization of adsorbed P through competition for P adsorption sites (Xu et al 2006). The products of organic residue decomposition can also modify the availability of native soil P (Yadvinder et al 1992;Nwoke et al 2004). In waterlogged soils under rice, crop residues can increase the availability of indigenous P as a result of intense soil reduction (Singh et al 1988;Yadvinder et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Effects of straw retention and phosphorous fertilizer application on available phosphorus content in the soil solution during rice growth

Yan

Houqiang

Shen

et al. 2015

Paddy Water Environ

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Phosphorus (P) is an essential nutrient for proper rice growth, and available P in the soil solution is a direct source of P for rice uptake. In this study, a field experiment (experiment A: straw retention (SRT) treatment versus straw removal (SRM) treatment) exposed to 3 years of continuous SRT and a pot experiment (experiment B: five P levels; SRT and SRM treatments) with different concentrations of applied P fertilizer were conducted to study the effects of SRT and P fertilizer application on the available P concentration in the soil solution during rice growth and on rice yield. SRT decreased the available P concentration in the soil solution, although it did not alter the trend of available P concentration in the soil solution during plant growth. In addition, in the 10-20-day period after transplantation, the available P concentration in the soil solution was high, although it decreased thereafter. The available P concentration in the soil solution increased with the amount of applied P fertilizer, and the rice yield also increased with increasing applications of P fertilizer. The results of experiments A and B showed that SRT had no significant impact on the rice yield; however, continuous observations over a number of years are required to verify the results.

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Section: Introductionmentioning

confidence: 99%

Effects of straw retention and phosphorous fertilizer application on available phosphorus content in the soil solution during rice growth

Yan

Houqiang

Shen

et al. 2015

Paddy Water Environ

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“…Although there wasr>M weight loss of 68-71 % after 15 weeks, the physical structure of the bunch was still obvious. According to Yadvinder Singh et al (1992), the easiliy decomposable parts of plant residues containing sugars, cellulose and protein decomposed first, leaving the more resistant lignified structures. Decomposition rate of green manures or crop residues has been significantly correlated to the organic composition of lignin:N (Taylor et al,1989;Thomas and Asakawa, 1993).…”

Section: Discussionmentioning

confidence: 99%

“…C/N ratios of net immobilization. Actually, several studies have shown that plant residues cannot have a constant decomposition rate, because they have 2 distinct N components, one decomposing rapidly and the other slowly (Yadvinder-Singh et al 1992). The easily decomposable materials are partly synthesized into microbial products.…”

Section: Discussionmentioning

confidence: 99%

Decomposition of oil palm empty fruit bunches in the field and mineralization of nitrogen

Rosenani

Hoe

1996

Progress in Nitrogen Cycling Studies

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Currently, most of the EFBs (empty fruit bunches) that come out of the mill as waste are used as an organic fertilizer for oil palms. An experiment was conducted to study the decomposition of EFBs applied single-layered or double-layered under oil palm field conditions, and to investigate the availability of N as a result of mineralization in 15 weeks period. The experiment was set up using lysimeters filled with topsoil of the area (an Oxisol). The EFB biomass had reduced to 50% of initial DM (dry matter) weight in 7.5 weeks in the double-layered and 8.5 weeks in the single-layered EFB. After 15 weeks only 32% and 29% of the EFB initial dry matter weights were left in the single-layered and double-layered, respectively. The CIN ratios had reduced from 57 to 31 in the single-layered and from 55 to 24 in the double-layered EFB. About 50% of the initial EFB N was left after 15 weeks. The total nitrogen in the soil had increased from 0.23% to 0.27% in the single-layered and 0.28% in the double-layered EFB. The soil pH increased by 2-3 units. However, very small amounts of mineral N were found in the leachate indicating that in the 15 week period little mineralized N was available for plant uptake. This was probably due to immobilization by microbes, retention by the EFBs together with moisture, and also lost through NH3 volatilization and denitrification.

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“…Previous research has reported sunn hemp biomass to average between 1 and 9 Mg ha -1 in 45 to 90 days after planting, respectively (Mansoer et al 1997;Morris et al 1986;Schomberg et al 2007;Reeves et al 1996;Yadvinder et al 1992). Although environmental conditions affect potential biomass production, substantial amounts of biomass can be achieved under typical late-summer and autumn conditions to aid in erosion control, nematode and weed suppression, and N accumulation before frost occurs.…”

Section: Sunn Hemp Cover Cropsmentioning

confidence: 99%