Effect of feldspar as a K natural source on climbing snap bean yield under plastic house

الملخص EN

Climate change impacts, sustainable food production and conserve the natural sources and energy create the drive forces to create new techniques in agricultural systems pay more consideration to the environmental.The study was conducted during two successive seasons 2012/2013 and 2013/2014 at Central Laboratory for Agriculture Climate plastic house (CLAC), Agriculture ResearchCenter (ARC), Dokki,Gizagovernorate, Egypt.

The main objectives of the study were alternating the natural fertilizers instead of synthetic chemical fertilizers, maximize the yield production and qualitybeside conserve the environmental and energy.

The investigation studied the effect of different three rates of feldspar fertilizer (100%, 125%, 150%) from recommended dose, twoforms of feldspar (granule and fine powder fertilizer)compared to standard potassium sulfate 100% combined withtwo cultivars (Alhamma and Moralida)in pots culture on productivity and podquality of climbing snap bean (Phaseolus vulgarisL.) in factorial experiment grown under unheated plastic house.

Vegetative growth (number of leaves, plant height, stem diameter and number of branches), chemical constituents of plant leaves (N, P and K), total yield per plantphysical quality of pods (pod diameter, pod length and pod weight), fibers (%) were recorded.

The obtained results indicated that increasing the rate of feldspar from 100 to 150 % had no positive effect on the yield.

Otherwise, using bothK-Granulee feldspar and K-fine feldsparat 100%gave the highest total yield per plant.Snap bean cv.Moralida recorded higher total yield per plant (16% more) than cv.

Al-Hamma under unheated plastic house.

The use of natural feldspar was more efficient on different scales (environment, economic, energy and etc.) than K-chemical fertilizer to match sustainable production of snap bean under plastic house.