Nutrient uptake and yield of sweet pepper as affected by stage of development and N form

Abstract

Uptake of NO 3 , NH 4 + , P, K ++ , Ca ++ and Mg ++ , as influenced by the stage of plant development and three NO 3 -:NH 4 + ratios (1:0, 1:1, and 0:1), was determined for sweet pepper (Capsicum annuum L. cv. 'California Wonder').Uptake was highest during fruit development and immediately after fruit harvest, indicating that fruit removal promotes nutrient uptake. When NO 3 -and NH 4 + were supplied in equal concentrations, NO 3 -was absorbed more readily. Each increment in NH 4 + decreased the uptake of K + , Ca ++ , and Mg ++ by fruit tissue, while no significant effect on the N and P content of the fruit was observed.Ammonium nutrition reduced plant dry weight and fruit yield in comparison to NO 3 -. Results from this study suggest that NO 3 -is the preferred N form, and that fertilizer application should be scheduled according to specific physiological stages to maximize nutrient uptake. Nutrient content of vegetative tissue was not indicative of potential yield.

Ammonium reduces growth, fruit yield and fruit quality of watermelon

“…These results show that the presence of ammonium reduces the total uptake of other essential cations and are consistent with previous results on other crops (Sasseville and Mills, 1979;Chance and Mills, 1990;Marti and Mills, 1991).…”

“…The uptake of all-N was similar for the 3:1 and 1:1 treatments. These results, showing that all-N uptake was not affected by NO 3 :NH 4 ratios and that N-uptake remained high during fruit development for both N-forms, differ from those reported on corn (Mills and McElhannon, 1982 Marti and Mills, 1991;Smittle and Threadgill, 1982), but differ from those on corn (Mills and McElhannon, 1982) and bell pepper (Marti and Mills, 1991).…”

“…bell pepper (Marti and Mills, 1991). Increasing NU, levels reduced the uptake of K, Ca and Mg by cucurbits (Barker and Maynard, 1972;Elamin and Wilcox, 1986).…”

Soil management for sustainable crop disease control: a review

“…Direct changes in host susceptibility to infection at higher levels of nitrogen supply have been postulated but are still controversial (Savary et al 1995). Growth and disease responses to high levels of nitrogen have been documented for a range of plants and pathogens (Marti and Mills 1991;Sasseville and Mills 1979;Smiley and Cook 1973). The effect of soil nitrogen level on disease development in different agricultural crops has been shown in Table 1.…”

Dry-Matter Allocation and Nutrient Uptake Dynamic in Pepper Plant Irrigated with Recycled Water by Different Nitrogen and Potassium Rate

“…These results agree with those of previous studies (Segura et al 2009), with greenhouse tomatoes, in which differences in NK application rates did not cause differences in extraction of nutrients by crop. This suggests that greater application of NK does not produce effects on nutrient concentrations in the tissue but increase yield; consequently nutrient content of vegetative tissue is not indicative of potential yield and DM (Marti and Mills 1991).…”