Intercropping Systems of Sunflower with Peanut under Different Irrigation Regimes and Potassium Fertilizer Levels

Abstract

T WO FIELD experiments were conducted at the research farm of Ismailia Governorate, Egypt during 2016 and 2017 summer seasons. This study was used to determine the suitable spatial arrangement of sunflower and peanut in an intercropping system under three irrigation water levels and three fertilizer (K) levels on yield, the land and water equivalent ratios and farmer's net income. The three irrigation treatments (0.7, 1.0 and 1.2ETo), the three K fertilizer levels (57, 86 and 114K 2 O kg/ha) and the four intercropping systems of sunflower and peanut (different spatial arrangements) were arranged in a strip split plot with three replications. The results indicated that application of 1.0 and 1.2ETo had similar effect on most of yield traits of the intercrops. Application of 114K 2 O kg/ha had the highest values of most yield traits of the intercrops. Intercropping sunflower with peanut (S1), where peanut seeds were sown on both sides of all the raised beds, sunflower seeds were sown on one row above the raised beds and the following bed was left without intercropping gave the highest values of peanut and sunflower yield and its attributes. In conclusion, the highest yield, land and water equivalent ratios, as well as farmer's net income can be obtained under 1.2ETo, 114K 2 O kg/ha and S1 intercropping system.

Mitigation of the impact of water deficiency on intercropped sesame and peanut systems through foliar application of potassium-silicate and triacontanol

“…The application of K-Si under water deficiency not only increase WER but also improved LER. These results are in agreement with the findings of Ouda et al (2018a), who found that the application K2O fertilizer at the highest level (114 kg/ha) under moderate water stress (1.0 ETo) increased LER values as compared to the lowest level of K2O fertilizer (50 kg/ha) under full irrigation (1.2 ETo) in peanut /sunflower intercropping system. Abd-Allah et al (2021), who found that the value of LER under the application of 200 ppm potassium silicate and irrigation treatment 100% ETo was higher than its counterpart value under irrigation with 120% ETo and no spraying in both growing seasons.…”

“…These results are in line with the findings of Gomaa et al ( 2021) who mentioned the that oil percentage recorded the highest values with irrigation after depletion of 40% of available soil water. Ouda et al (2018a) stated that the oil percentage in peanut seeds was increased under irrigation with 100% ETo, compared to the application of 120% ETo. Although sesame is a drought-resistant crop, water stress affects sesame growth, capsule development, and final yield (Wang et al, 2016)..…”