科研之友
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摘要
Lettuce plants (cv. 'Simpson') were grown for 10 weeks during winter under greenhouse to investigate the possibility of replacing the supplemental nitrogen (N) fertilization by using Amino16 (R). Amino16 (R) is a hydrolyzed protein solution containing 11.3% L-amino acids (alanine, arginine, aspartic acid, glutamic acid, glycine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, proline, serine, threonine, tyrosine and valine), 4% total N and 25% organic matter, produced of plant origin raw materials. Three weeks after transplanting, supplemental fertilization with ammonium nitrate or Amino16 (R) was applied. Ammonium nitrate solution was applied to the soil, while Amino16 (R) either to the soil or foliage. Two and 4 weeks later, the foliar application of Amino16 (R) was repeated. Plants without any supplemental fertilization were used as control. The results indicated that crop uniformity was substantially increased when plants received supplemental fertilization with ammonium nitrate and even more when Amino16 (R) was applied to soil. Nutritional quality of lettuce plants, in terms of dry matter, total soluble solid, ascorbic acid and total phenol contents, was not affected by supplemental fertilization either with ammonium nitrate or Amino16 (R). On the other hand, the application of Amino16 (R) prevented the accumulation of nitrates observed in plants fertilized with ammonium nitrate. Moreover, the foliar application of Amino16 (R) resulted in significant increase of antioxidant capacity, in comparison to the control. According to the above, the use of Amino16 (R) as alternative of inorganic supplemental fertilization is of high importance, in order to improve lettuce crop uniformity, minimize nitrate content in plants, without negative effect on other nutritional components or yield.
- 出版日期2014
