A study of vegetable cultivated in cooling culture ground byu erground Dam developed water.

在假定地下水有助于保持栽培基质凉爽或高温的前提下，通过地下VP管，将23ﾟC下发育的大坝地下水输送到栽培地内，对栽培地蔬菜的生长状况进行了研究。将土壤放入180×40×40 cm的木箱中，制成培养基料。通过距地表5 cm以下的VP管(直径5 cm)输送23ﾟC丹参地下水，以保持凉爽或栽培地的凉爽。准备了三种不同的培养场地。无管(对照)、一管两管养殖场。生菜(Sarada Na)和Chisya分别在1995-96年的夏季和冬季种植。1997年，为了研究栽培地的冷热效应，种植了菠菜。试验结果：1995-96作物季节：夏季栽培的生菜(Sarada Na)以两根VP管和一根VP管衬里的栽培基质产量最高。在CONT…上更严重的是，不使用管状培养基时产量最低。与无管培养基组相比，单管和双管培养基产量分别提高1.8倍和2.2倍。由此可见，丹水对作物生长有一定的降温作用。在冬季，一管和二管栽培比不管栽培(对照)增产13.0倍和16.0倍。结果表明，1管和2管培养基比对照分别增产3.6倍和4.3倍。从以上结果可以看出，坝下地下水通过地下VP管对菠菜生长有明显的热效应。1997作物季节：1997年5月(春季)、7月(夏季)、9月(秋季)和11月(冬季)播种菠菜种子，并进行了相应的试验。在所有的VP管栽培基质中，由于开花早期生长，5月份的作物都出现了歉收。由于高温影响，7月份的作物也受到严重影响，早花导致生长停滞。根据上述结果，可以清楚地看出，春夏季节菠菜种植难度很大。秋、冬两季菠菜栽培受各种栽培基质的影响较大。喷施VP管的菠菜产量比不涂VP管的对照增产50%~70%以上。较少

An investigation was done on the growing condition of vegetable cultivated in culture ground by passing ground water of Dam developed at 23ﾟC through VP pipes below the culture ground on the supposition that the ground water help maintains the culture ground media cool or hot. Culture media was prepared by putting soil in wooden box (180x40x40cm). Cool or culture ground was maintained by passing 23ﾟC ground water of Dan through VP pipes (5cm diameter) installed below 5cm from the soil surface. Three kinds of culture ground were prepared viz. no pipe (control), one pipe and two pipes culture ground. Lettuce (Sarada na) and Chisya were grown in summer and winter seasons of 1995-96, respectively. In 1997, Spinach was grown to investigate the cool orhot effect of culture ground. Results of the experiments :1995-96 crop season :The highest yield of Lettuce (Sarada na) cultivated summer season was obtained from the culturemedia lined with two VP pipes followed by the one VP pipe. On the cont … More rary, no pipe culture media (control) gave the lowest yield. In comparison to no pipe culture media (control), the harvested yield of one pipe and two pipes culture media were 1.8 and 2.2 times higher, respectivery. Thus from the result it is seen that ground water of Dan showed cool effect on the crop growth. While in winter season, the first crop of Chisya showed the result that one pipe and two pipes culture media gave 13.0 and 16.0 times higher yield than that of no pipe culture media (control). And the second crop of Chisya showed that one pipe and two pipes culture media produced 3.6 and 4.3 times higher yield than of no pipe culture media (control). It was obvious from the above result that the ground water from the Dam passed through VP pipes below the culture ground showed hot effect on the growth of Chisya.1997 crop season :Spinach seeds were sown in May (spring), July (summer), September (Autumn) and November (Winter) of 1997 and the experiments were conducted accordingly. The May crop was failed due to flowering early growth stage in all VP pipes culture media. The July crop was also badly affected dueto high temperature effect and consequently the growth was stopped by the early flowering. Depending on the above results, it is clearly seen that spring and summer seasons spinach cultivation are difficult. Autumn and winter seasons spinach cultivation were favorably affected by all kinds of culture media. Above 50-70% higher spinach yield was obtained from the culture media lined with VP pipe compared with that of the no VP pipe culture media (control). Less