Two field experiments were carried out during the two growing seasons of 2019/2020 and 2020/2021 at the El Kanater Hort. Res. Station, El Kaloubia governorate Egypt, to study the effect of irrigation with normal water, magnetized water at 100, 75% of potential evapotranspiration, under different levels of N, P and K of the recommended doses fertilization and their combined interactions on productivity and water use efficiency of globe artichoke. The experiment design was a split plot with three replicates and the main plots were allocated to irrigation water treatments whereas the sub-plots were concerned with NPK fertilizer levels. The results indicate that irrigation with 75 or 100% ETc magnetic water produced the maximum vegetative growth, early and total yield / plant and ton/fed, head dry matter percent, inulin content, water use efficiency and head NPK percentages. The optimal NPK fertilizer rate for artichoke plants is 75% and irrigation with magnetized water at 75% ETc mixed with NPK fertilizers at 75% of recommended rates produced the best interaction of yield characters and its constituent. The highest water use efficiency (7.51 kg m-3 and 7.40 kg m-3 )) was obtained by 75% ETc magnetized mixed by100 or 75 % NPK as well as ETc 75% magnetized water combined with 75% of recommended NPK (9.21 kg m-3 ) in the first and second season respectively, It might be concluded that irrigated artichoke plants with 75% ETc magnetized water and fertilize with 75% of recommended NPK resulted in a 25% reduction in irrigation water and NPK fertilization.
This study was conducted to investigate the impact of foliar application calcium nitrate and chelated calcium in three levels (0, 380 and 760 ppm as Ca) in combination with boric acid (85 ppm as B) on the growth, yield, quality, and insect control of globe artichoke cv. Herous in the 2019/2020 and 2020/2021seasons at EL-Qanater Research Station Farm in Qalubia Governorate. The experimental design was a complete randomized block with three replicates. Results showed that foliar spraying of calcium nitrate at 760 ppm or chelated calcium at 380 and 760 ppm + boron (85 ppm) resulted in the highest values of vegetative growth, the physical characteristics of early, total yield and the highest head number of early yield. Moreover, spraying Ca NO3 at (380 ppm) + B or both Ca-EDTA levels + B produced the maximum head number of total yield. The highest dry matter % and inulin content was achieved by spraying Ca NO3(760 ppm) + B or both Ca-EDTA levels + B. Spraying Ca-EDTA (380 ppm) + B achieved the highest values of total phenols and phosphorus %. Spraying both Ca NO3(760 ppm) + B produced the highest N and protein % as well as both Ca-EDTA levels + B produced the highest K, Ca, and B content of heads. It could be suggested that spraying Ca-EDTA at 380 and 760 ppm + boron at 85ppm were effective for enhancing artichoke production, improving its quality, and defending off three types of aphids.
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