Comparative the impact of organic and conventional strawberry cultivation on growth and productivity using remote sensing techniques under Egypt climate conditions
Hassan A. Hassan1, Sahar S.Taha1, Mohamed A. Aboelghar2, Noha A. Morsy2
1Department of Vegetables, Faculty of Agriculture, Cairo University, Cairo, Egypt
2National Authority for Remote Sensing and Space Sciences (NARSS), Cairo, Egypt
Abstract
Two years field experiment on strawberry plants (cv. Sweet Charlie) in Qalyubia Governorate, Egypt was carried out to study the effect of different growing conditions (organic and conventional) and the effect of some colors of plastic mulch such as clear, black, and silver on the quantitative and qualitative characteristics of the strawberry plantations using hyper spectral remotely sensed data. As the first step, spectral reflectance pattern for the different treatments (fertilization and colors of plastic mulch) was identified through in situ spectral measurements. It was found that silver plastic mulch recorded higher values with all observed vegetative and fruit traits, as compared with an organic strawberry growing systems without plastic mulch. Spectral reflectance parameters in form of vegetation indices (VIs) were examined as yield estimators and their correlation with leaf area index (LAI) was observed. Generated models with accuracy assessment were explained and the optimal vegetation index to estimate yield under each treatment was identified. Generally, it was found that fertilization has more effect on spectral characteristics than plastic mulch. Spectral vegetation indices (VIs) showed higher accuracy than LAI as yield estimators. (Spectral – yield) models showed the same trend with adequate correlation coefficient (r2) exceeded (0.7) except the treatment of black plastic mulch conventional system that showed (r2) less than (0.6) with two yield estimators. All generated models with an accuracy of each model are explained in the following sections.
