PROBLEM TO BE SOLVED: To provide an auxiliary sheet capable of preventing the occurrence of sunburn in crops in a house cultivation or a tunnel cultivation.SOLUTION: The present invention relates to an auxiliary sheet 17 covering a sheet for cultivating a house. The light blocking rate is 10 to 40%. The average transmittance of light having a wavelength of 250 to 1100 nm is 50 to 90%. The sheet is formed of a nonwoven fabric. The single fiber fineness of the constituent fibers of the nonwoven fabric is 3 to 10 decitex. The basis weight of the nonwoven fabric is 15 to 30 g/m2. The constituent fibers of the nonwoven fabric are colored in blue so that the absorption peak of the transmitted light curve is in the range of 570 to 700 nm.SELECTED DRAWING: Figure 1【課題】ハウス栽培やトンネル栽培において作物に日焼けが発生することを防止できる補助シートを提供する。【解決手段】ハウス栽培用のシートに被せられる補助シート１７であり、遮光率が１０～４０％であり、波長２５０～１１００ｎｍの光の平均透過率が５０～９０％であり、不織布にて形成され、不織布の構成繊維の単糸繊度が３～１０デシテックスであり、不織布の目付が１５～３０ｇ/ｍ２であり、透過光曲線の吸光ピークが５７０～７００ｎｍにあるように、不織布の構成繊維が青色に着色されている。【選択図】図１
