Lodging in Small Grains¹

Factors Associated with Lodging Resistance in Oats1

“…Literature relating to lodging resistance in cereals is very ex:tensive. Of the plant characters studied, a large diameter of culm has been found consistently and closely associated with resistance to lodging (3,4,5,9,12,13,14). Wettstein (15) reported that total cross section area of the culm and large cell size were also…”

“…Some disagreement among the various authors was noted regarding the importance of cell wall thickness (3,4,6,13,14), culm wall thickness (3,4,8,13) and amount of sclerenchyma (3,4,6,8,9) and hypodermal (4,13,14,15) tissue in the culm. Disagreement also exists among investigators concerning the relationship between lodging and plant height ( 3,4,5,6,8,9,10,12,15), length of internodes (1,3,4,8,15), breaking strength of straw (1,5,12), weight per unit length of culm ( 1,6,8,13), number of vascular bundles in the culm ( 3,4,6,8,9), and width of cross section area of vascular bundle ( 6,8,9,15). Investigators disagree regarding the importance to lodging resist...…”

Study on the mechanical properties of paddy culm with reference to lodging

“…But, the methods for measuring the breaking strength of culm were different in each study (3,5,10,13,33,42,51,52,62,65,70,78,81). Therefore, the mechanical properties that the resistance power of culm showed, were also different.…”

Recurrent selection for lodging resistance in oats

“…Instruments and methods for measuring breaking strength of small grain straw are described by these same authors. Hancock and Smith (1963) found that breaking strength had no direct correlation with lodging resistance, and Clark and Wilson (1933) indicated that breaking strength of straw was not a reliable measure of lodging resistance.…”