Abstract
Pot experiment was designed using certain fertilization plans including organic and inorganic fertilization with different levels of applied Fe, Zn, Pb and Cd; snap bean plant was the adopted crop, various growth stages being taken in consideration, to define the patterns of relationship between the status heavy elements in both soil and plant. As expected, results revealed significant positive responses for dry weight of either shoots or roots of the studied plants receiving either organic or inorganic fertilization compared with those of control treatments at both vegetative and flowering stages; negative responses were, however, obtained with NPK treatments especially for pods. In general, all studied elements were increased of both shoots and roots at all growth stages receiving either FYM or NPK fertilization compared to control treatments, not receiving fertilizers, which were generally inferior. Both low and medium rates of the applied Pb and Cd were, in general, favorable with high rates being hazardous possibly a resultant of toxicity phenomenon through effects on metabolic activities within plant tissues.With regard to Pb concentration in both shoots and roots, obtained data showed relatively different responses to FYM and NPK treatments which were generally similar with control being mostly inferior. It may be worth to mention that status of the studied heavy elements, with respect to various studied treatments, had almost similar trends in both shoots and roots of the studied snap been plants. This may reflect the relative low responses to translocation. In other words, absorption and translocation of the concerned heavy elements were generally similar in responses to the studied treatments. In fact, uptake of metals from soil seemed to depend on different factors including solubility of such metals, soil pH, plant growth stage, crop species, fertilization and, of course, soil features; this was finally reflected on the obtainable pattern representing the relationship between element status in different plant parts and that of available form in soil. The general response of concentration in the different studied plants parts, shoots, roots and pods, may reflect the good distribution for the concerned heavy elements within plants tissues even under different fertilization systems and variable rates of applied heavy elements. The results showed a positive linear relationship of these elements in different growth stages while negative in pods.
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Claims 9
Claim · model-written summary
Organic fertilization significantly raised shoot and root dry weight at vegetative and flowering stages.
Verbatim
e0“significant positive responses for dry weight of either shoots or roots of the studied plants receiving either organic or inorganic fertilization compared with those of control treatments at both vegetative and flowering stages”
t0“SNAP BEAN PLANT”
Claim · model-written summary
Inorganic fertilization significantly raised shoot and root dry weight at vegetative and flowering stages.
Verbatim
e0“significant positive responses for dry weight of either shoots or roots of the studied plants receiving either organic or inorganic fertilization compared with those of control treatments at both vegetative and flowering stages”
t0“SNAP BEAN PLANT”
Claim · model-written summary
NPK treatment had a negative response especially in pods.
Not reportedComparator
Verbatim
e0“negative responses were, however, obtained with NPK treatments especially for pods.”
t0“SNAP BEAN PLANT”
Claim · model-written summary
FYM increased studied element content in shoots and roots relative to control.
Verbatim
e0“all studied elements were increased of both shoots and roots at all growth stages receiving either FYM or NPK fertilization compared to control treatments”
t0“SNAP BEAN PLANT”
Claim · model-written summary
NPK increased studied element content in shoots and roots relative to control.
Verbatim
e0“all studied elements were increased of both shoots and roots at all growth stages receiving either FYM or NPK fertilization compared to control treatments”
t0“SNAP BEAN PLANT”
Claim · model-written summary
Low and medium Pb and Cd rates were generally favorable, while high rates were hazardous.
Verbatim
e0“Both low and medium rates of the applied Pb and Cd were, in general, favorable with high rates being hazardous”
t0“SNAP BEAN PLANT”
Claim · model-written summary
Studied heavy elements showed similar trends in snap bean shoots and roots.
Verbatim
e0“status of the studied heavy elements, with respect to various studied treatments, had almost similar trends in both shoots and roots of the studied snap been plants.”
Claim · model-written summary
Element concentration had a positive linear relationship across growth stages.
Verbatim
e0“The results showed a positive linear relationship of these elements in different growth stages while negative in pods.”
t0“SNAP BEAN PLANT”
Claim · model-written summary
Element concentration had a negative relationship in pods.
Verbatim
e0“The results showed a positive linear relationship of these elements in different growth stages while negative in pods.”
t0“SNAP BEAN PLANT”
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