不同水分梯度与前茬作物对普通白菜产量的影响

Effect of Different Water Gradient and Previous Stubble Crops on Production of Pakchoi

以普通白菜Pakchio（Brassica campestris ssp．ChinensisL）品种一代交配华冠青梗菜为供试材料（以下简称“青梗菜”），在商丘学院实验田研究了不同水分梯度（土壤含水量分别为田间持水量的80％～90％（水1）、60％～70％（水2）和40％～50％（水3））和前茬作物（“青梗菜”、苋菜和黄瓜）对“青梗菜”单株叶片数目与单株生物量的影响。结果表明：前茬作物相同时，单株叶片数目在地块中表现为：水2显著〉水1和水3，而后二者之间差异不显著；水分梯度相同时，单株叶片数目在地块中表现为，前萑黄瓜和前茬苋菜显著〉前茬“青梗菜”，而前二者之间差异不显著。前茬作物相同时，单株鲜／干重均表现为，水2显著〉水3显著〉水1；除第1种水分梯度外，单株鲜重在后2种水分梯度下均表现为，前茬黄瓜显著〉前茬苋菜显著〉前茬“青梗菜”；单株干重则在，3种水分梯度下都表现为，前茬黄瓜显著〉前茬苋菜显著〉前茬“青梗菜”。综上，土壤含水量为田间持水量的60％～70％，前茬作物为黄瓜时，“青梗菜”产量最高。

With a cultivated variety of Pakchio （Brassica campestris ssp. Chinensis L. ） named ＇Qing Geng Cai＇ as experiment material. In the experiment field of Shangqiu Universtity,the numbers of leaves and the biomass per plant of ＇Qing Geng Cai＇ treated with different water gradient （soil moisture content respectively were 80%- 90% （water 1）, 60 % - 70 %（ water 2） and 40%-50% （water 3） of field capacity）） and previous stubble crops （＇Qing Geng Cai＇ , Amaranthus tricolor L and Cucumis sativus L. ） were studied. The results showed that,the number of leaves per plant was the highest under the second water gradient; under the same water gradient, the number of leaves per plant was presented as：previous stubble Cucumis sativus L. significantly〉previous stubble Amaranthus tricolor L. significantly〉 previous stubble＇Qing Geng Cai〉 except for the first water gradient. Fresh and dry weight per plant under the same previous stubble both were presented as：water 2 significantly〉water 3 significantly〉water 1;flesh weight per plant under the same water gradient was presented as： previous stubble Cucumis sativus L. significantly〉previous stubble Amaranthus tricolor L. significantly〉previous stubble＇Qing Geng Cai 〉 except for the first water gradient;dry weight per plant under three water gradient all were presented as：previous stubble Cucumis sativus L significantly〉previous stubble Amaranthus tricolor L significantly previous stubble ＇Qing Geng Cai＇. All above,the production of Pakchoi was highest when soil moisture content was 60%-70M of field capacity and previous stubble crop was Cucumis sativus L..