PHP Solr 从不返回找到的文档

我正在尝试通过php查找solr实例中的文档。当我去我的solr管理员并进行搜索时，我得到以下内容：

  <response>
    <lst name="responseHeader">
    <int name="status">0</int>
<int name="QTime">443</int><lst name="params">
<str name="indent">on</str><str name="start">0</str>
<str name="q">*:*</str><str name="rows">10</str>
<str name="version">2.2</str></lst></lst>
<result name="response" numFound="4" start="0">
<doc>
<str name="description">An Aweomse dish</str>
<arr name="ingredients"><str>Radish</str><str>Beans</str><str>Curry</str></arr>
<str name="name">Alfredo Chehse</str>
<str name="recipe_id">10</str><str name="thumbnail">123343f342</str>
</doc>
<doc>
<str name="description">An Aweomse dish</str>
<arr name="ingredients"><str>Radish</str><str>Beans</str>
<str>Curry</str></arr><str name="name">Alfredo Chehse</str>
<str name="recipe_id">11</str><str name="thumbnail">123343f342</str>
</doc>
</result>
</response>

所以我知道数据在那里。现在在我的PHP中，我有这个：

$query = new SolrQuery();
        $query->setQuery('Radish');
        $query->setStart(0);
        $query->setRows(50);
        $query->addField('ingredients') -> addField('name');
        $query_response = $client->query($query);
        $query_response->setParseMode(SolrQueryResponse::PARSE_SOLR_DOC);
        $response = $query_response->getResponse();
        print_r($response);

但我总是得到一个空的结果集：

SolrObject Object(

 [responseHeader] => SolrObject Object
        (
            [status] => 0
            [QTime] => 1
            [params] => SolrObject Object
                (
                    [fl] => ingredients,name
                    [indent] => on
                    [start] => 0
                    [q] => radish
                    [wt] => xml
                    [rows] => 50
                    [version] => 2.2
                )
        )
    [response] => SolrObject Object
        (
            [numFound] => 0
            [start] => 0
            [docs] => 
        )

我的问题是为什么无论我搜索什么，我的结果总是空的？