Synthesis of controlled release hydrogels from dimethylacrylamide/maleic acid/starch and its application in lettuce cultivation

Advances in Controlled Release Fertilizers: Cost‐Effective Coating Techniques and Smart Stimuli‐Responsive Hydrogels

“…This water retention ability resulted, during pot experiments with lettuce plants, in a decrease in membrane damage index compared to the control sample, showing that the hydrogels, in addition to nutrient release, can also prevent water deprivation, in crops. [ 82 ]…”

“…This water retention ability resulted, during pot experiments with lettuce plants, in a decrease in membrane damage index compared to the control sample, showing that the hydrogels, in addition to nutrient release, can also prevent water deprivation, in crops. [82] Some possibilities for customizing nutrient release to the rhizosphere microenvironment can be found by comparing the pH window of stimulus response hydrogels to the pH gap between bulk soil and plant's rhizospheres. Several investigations have reported hydrogels that are stable at near-neutral pH (about 6 to 8), but that expand more rapidly at lower pH levels.…”

Significance of biopolymer-based hydrogels and their applications in agriculture: a review in perspective of synthesis and their degree of swelling for water holding

“…These hydrogels showed great water absorption ability and have expressed different urea release behavior at different pH values (Table 2). 19 Starch and zeolitenanoparticle-based hydrogel can be prepared using an alkaline hydrolysis technique followed by a chemical cross-linking reaction, using MBA as a cross-linker and ammonium persulfate as an initiator. It has been observed that the amount of zeolite nano-particles in the hydrogel inuences its water absorption capacity.…”