Biofumigant Biomass, Nutrient Content, and Glucosinolate Response to Phosphorus

Abstract

Information on biofumigant-green manure vegetative biomass, nutrient, and glucosinolate content sensitivity to phosphorus (P) is lacking for species used in potato and sugarbeet production. Therefore, available P effects on field-grown condiment yellow mustard (Sinapis alba, cv. IdaGold) and oilseed radish (Raphanus sativa, cv. Colonel) were evaluated (2001-03). Low soil P was generally more limiting to radish foliage P concentrations or uptake than to the mustard, suggesting inherent differences in their ability to access and accumulate P. While radish P and S concentrations increased with higher P, concentrations in mustard were either unaffected or reduced. Foliage P concentrations were more closely related to biomass of radish (r 2 = 0.46) than mustard (r 2 = 0.11). Mustard exceeded radish in biomass and S accumulation. Phosphorus effects on glucosinolates producing ionic or isothiocyanates were relatively insignificant. These biofumigants differ appreciably in their ability to access and accumulate P, but P effects on nutrient content or glucosinolates were minor. 743 744 B. D. Brown et al.

Forage Radish Cover Crops Increase Soil Test Phosphorus Surrounding Radish Taproot Holes

“…We did not fi nd any other studies reporting P uptake by forage radish cover crops in the literature; however, reports of P uptake of oilseed radish (Raphanus sativus L. var. oleiferus), a close relative of forage radish with similar characteristics, are similar to our P uptake fi ndings (Brown et al, 2008;Wang et al, 2008). Brown et al (2008) also found that P uptake by oilseed radish increased in response to P fertilizer applications.…”

“…oleiferus), a close relative of forage radish with similar characteristics, are similar to our P uptake fi ndings (Brown et al, 2008;Wang et al, 2008). Brown et al (2008) also found that P uptake by oilseed radish increased in response to P fertilizer applications. In our experiment, the soil test P values were in the optimum range for crop production.…”

Reduced Potential for Nitrogen Loss in Cover Crop–Soybean Relay Systems in a Cold Climate

“…This indicates that P might have been released through decomposition of the pennycress biomass, which is in line with the interpretation above that N was mineralized from oilseed biomass. Blackshaw et al (2004) reported P concentrations in field pennycress biomass ranged from 1.5 to 1.7 g kg −1 , which is considerably more than the 0.3 to 0.5 g kg −1 reported for oilseed radish (Brown et al, 2008), but only slightly more than the 1.2 to 1.4 g kg −1 reported for winter rye (Karasawa and Takahashi, 2015). All of these values are below the range of P concentrations in the cover crop shoot biomass sampled in the current study.…”

Flavonoid, Nitrate and Glucosinolate Concentrations in Brassica Species Are Differentially Affected by Photosynthetically Active Radiation, Phosphate and Phosphite

“…Coincidentally, in rocket salad ( Eruca sativa ), Chun et al (2017) found that applications of N and P at low concentrations, or higher concentrations of potassium enhanced the synthesis of total GLs; in particular 5 and 2 mM N and P possessed much higher levels of several types of aliphatic GLs than other nutrient concentrations tested. On the contrary, in yellow mustard ( Sinapis alba ) and oilseed radish ( Raphanus sativa ), P effects on GLs producing ionic or isothiocyanates were relatively insignificant (Brown et al, 2008).…”

“…Ida Gold) and radish ( Raphanus sativa cv. Colonel), and these crops differ significantly in their ability to uptake and accumulate P (Brown et al, 2008). However, P deficiency does increase the total GL concentration in B. campestris L. subsp.…”