Droughtpractice sharply decreased critical saturation deficiency and plant humidity needed (PHN) which made the plant water content improved under the condition of the same soil moisture.
干旱锻炼能明显降低临界饱和亏和植株需水度，使植株含水量在相同的土壤水分条件下得到改善。
2
Methods Based on soil radon diffusive theory, a model including the influences of soil radium content, emanation coefficient, soil porosity and moisturesaturation on radon exhalation was established.