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为了研究比较春小麦(Triticum aeslivulm L)与春大麦(Hordeum vulg-are L.)籽实产量,叶面积动态及干物质积累等方面的差异,于1980,1981两年在加拿大的萨斯克顿设置了专门试验。供试品种为两个小麦品种“Neepawa”“Pitic62”和“Bonanza”大麦品种,每年两个播期。各处理从播后第五周起,每隔一周取样测定各此叶面积大小(cm~2/株)和生物学产量(g/m~2);成熟后再收获测定各此籽粒产量,产量构成因素及其最终生物学产量。分析了各品种籽实产量与生物学产量间的关系。发现“Pitic62”和“Bonanza”品种籽实产量是其最终生物学产量的曲线函数,而“Neepawa”品种的籽实产量则与生物学产量呈线性相关。可见,对任一品种,高的生物产量必然形高的籽实产量。分析指出,在生育前期,“Bonanza”大麦品种既比小麦积累了较多的于物质,又形成了较大的叶面积,表现出明显的优势但随着作物趋近成熟,这种优势渐渐消失。尽管“Pitic62”的叶面积系数比“Neepawa”大,叶片功能期也长于“Neepawa”,二者的干物质积累在生育前期属同一类型,但由于晚熟,“Pitic62”的生物学和籽粒产量均为最高。当然,如能选育出在春季寒冷条件可迅速生长的小麦品种,即使不延长其成熟期也能获得高产。
In order to study the differences in seed yield, leaf area dynamics and dry matter accumulation of spring wheat (Triticum aeslivulm L) and spring barley (Hordeum vulg-are L.), a specialization was set up in Saskatoon, Canada, in 1980 and 1981 test. The tested varieties were two wheat varieties “Neepawa”, “Pitic62” and “Bonanza” barley varieties, with two sowing dates each year. Each treatment from the fifth week after sowing, sampling every other week to determine the size of each leaf area (cm ~ 2 / strain) and biological yield (g / m ~ 2); mature and then harvest each of the grain yield, yield Constituents and their ultimate biological yield. The relationship between seed yield and biological yield was analyzed. The seed yield of “Pitic62” and “Bonanza” was found to be a curve function of the final biological yield, while the seed yield of “Neepawa” was linearly correlated with the biological yield. Can be seen, for any species, high biological yield inevitable high seed yield. The analysis indicated that during the early growth period, the “Bonanza” barley varieties both accumulated more biomass and formed larger leaf areas than wheat, showing obvious advantages but gradually disappeared as the crops approached maturity . Although the leaf area coefficient of “Pitic62” was larger than that of “Neepawa” and the leaf functional period was longer than “Neepawa”, the dry matter accumulation of both was the same type in the early growth period, but because of late maturity, the biology and grain yield of “Pitic62” For the highest. Of course, if we can breed wheat varieties that can grow rapidly in the spring under cold conditions, we can get high yields without prolonging their maturity.